Mosquito Notes.—III

F. W. Edwards
1922 Bulletin of entomological research  
Wyeomyia (Phoniomyia) fuscipes, sp. n. ?. Head with metallic violet scales dorsally ; sides silvery below ; a line of golden scales at the junction of the violet and silver areas. Eyes separated by nearly the width of two ommatidia. Clypeus dull, dark brown. Tori black, with a strong grey pollinosity. Proboscis dark, slender, longer than the long front femora. Palpi dark, about one-seventh as long as the proboscis. Thorax with shining blackishbrown integument ; scales of prothoracic lobes
more » ... horacic lobes violet ; of mesonotum metallic bronzy ; of scutellum, pro-epimera and subspiracular area golden ; of remainder of pleurae silvery. Two or three small spiracular bristles. Abdomen blackish dorsally, pale golden laterally and beneath, the line of junction of the colours rather deeply incised, the black wedges situated at the apices of the tergites. Tergites 4-7 each with a small median basal whitish spot. Legs dark ; undersides of femora, tibiae, and first tarsal segments lighter ; no white markings on any of the tarsi. Wings with dark brown scales, the outstanding ones ligulate. Upper fork-cell nearly three times as long as its stem, its base nearer the base of the wing than is that of the lower fork-cell. Wing-length, 3 mm. Cotypes, 2 $ (Fiebrig). No exact data. This species is probably related to W. trinidadensis, Theo., differing in the entire absence of white on the tarsi and in other particulars. I think that Phoniomyia can be recognised as a good subgenus on the character of the proboscis, but whether its recent division by Bonne-Wepster & Bonne into Phoniomyia, Dodecamyia and Dyarina can be maintained seems open to serious question. Psorophora (Psorophora) ciliata, Fab. Some of the examples in the collection (all are females) seem to me to be indistinguishable from the North American species. They have the scales on the prescutellar space mostly flat and white, with a narrow area of golden ones in the middle. Some others may perhaps represent a distinct species (? tibialis, R.-D.) ; in these the pre-scutellar scales are all narrow and golden. Psorophora (Psorophora) pallescens, sp. n. Head clothed with pale buff-coloured flat scales. Proboscis and palpi mainly pale-scaled, some dark ones intermixed. Palpi of 9 nearly one-half as long as the proboscis, of <J longer than the proboscis by nearly the length of the last two joints, which are upturned and swollen. Clypeus light brown. Thorax with the integument light brown, mesonotum largely blackish. In the centre of the mesonotum is a longitudinal row of narrow, curved, golden scales, bordered on each side by a row of broad, flat, pale buff scales ; external to this is a pair of narrow, bare, blackish stripes ; the remainder of the mesonotum covered with broad, pale buff scales, except for a pair of short and rather broad bare black stripes, widely separated, just in front of the scutellum, and a pair of small rounded spots of deep black scales in the middle. Postnotum light brown. Mesonotal bristles numerous, short, blackish. Pleurae with dense broad buff scales ; bristles pale ; pro-epimeral bristles very small and weak ; about three moderately long spiraculars ; numerous lower mesepimerals. Abdomen uniformly clothed with pale buff scales; integument light. Male hypopygium practically as figured and described by Howard, Dyar and Knab for Ps. ciliata, Fab. Claspers with two sharp projecting points some little way before the tip. Tenth tergite with numerous short bristles ; tenth sternite with the tips cleft into three teeth. Lobes of ninth tergite each with about ten fine bristles. Legs pale ochreous ; tips of femora, and the whole of the tibiae and first two tarsal joints of the hind legs with long outstanding scales ; scales mostly pale, but with numerous dark ones intermixed. All joints of hind tarsi broadly white-ringed at the base. Femora and tibiae of o with long dense hair, much longer than the scales. Wings with mixed light and dark scales, the former preponderating on the costa and on most of the veins. Fork-cells about half as long again as their stems, their bases about level. Cross-veins closely approximated (actually in a line in one specimen). Wing-length, 6-5 mm. Cotypes, 1 (J, 4 $ (Fiebrig). This is obviously the species described and figured by Arribalzaga as Ps. ciliata. Since, however, the present species does not. appear to occur in North America, whence Ps. ciliata was described, it is likely that Arribalzaga's determination was incorrect. The thoracic ornamentation is very different in the two species, though the hypopygial structure shows that they are very closely allied. No specimens of Ps. pallescens have previously been received at the British Museum, nor apparently have any specimens been recorded apart from Arribalzaga's. Psorophora (Janthinosoma) fiebrigi, sp. n. Head with the integument mostly orange, becoming browner towards the front ; clypeus blackish ; scales orange ; bristles blackish. Palpi purple-scaled ; in 9 about one-quarter as long as the proboscis ; in <$ slender, longer than the proboscis by nearly the length of the last two joints. Proboscis slender, about equalling the front femora, with appressed purplish scales. Thorax with the integument shining black. Mesonotum and pro-epimera with small flat bronzy scales, none lighter at sides. Scutellum similarly scaled. Bristles black. Pleurae (except pro-epimera and the bare area behind them) densely clothed with silvery-grey scales, without the least tinge of ochreous ; bristles pale ; two or three spiraculars ; no lower mesepimeral. Abdomen purple-scaled dorsally, except for the first segment and the apical corners of the remaining segment, which are golden. Venter mostly golden, with narrow purple bands at the bases of the segments. Male claspers greatly expanded in the middle, and with a moderately long, slender, hooked tip ; the expanded portion with a patch of short recurved bristles on the outer side. Stem of claspettes long and rather stout, suddenly bent almost at right angles a little beyond the middle, tip very slightly expanded ; outer two filaments short and flattened, the outer one simple, the second distorted. Legs purple-scaled ; hind femora golden at the base beneath ; fourth hind tarsal segment white on the basal three-fifths to four-fifths, tip dark ; last hind tarsal segment white beneath except at the tip, upper surface more or less darkened, more so in $ than in $. Tibiae and first two tarsal segments of hind legs with the scales raised, but not very long. Wing scales dark. Fork-cells with their bases level, about one-third longer than their stems. Wing-length 4 mm. Cotypes, 5g, 4 $ (Fiebrig). Apparently most nearly allied to Ps. posticata, but smaller and with differently marked hind tarsi, rather shorter scales on hind legs, and differently formed claspettes. Psorophora (Janthinosoma) purpurascens, sp. n.
doi:10.1017/s0007485300045259 fatcat:5h6bhe3gwret5ejwhmbifw5vdy