WYEOMYIA TRINIDADENSIS 59 



Wings moderate, hyaline, tinged with smoky along edges of nervures ; petiole 

 of second marginal cell slightly shorter than its cell, that of second posterior 

 cell as long as its cell ; basal cross-vein distant less than its own length from the 

 anterior cross-vein ; scales of veins narrowly elliptical, brown, with a blue reflec- 

 tion, those on forks of second vein and apex of third vein broad and denser. 

 Halteres largely blackish. 



Legs slender, black, with a bronzy and blue reflection, trochanters silvery 

 white-scaled; femora pale bronzy beneath except at their apices; base of the 

 first tarsal joint of the hind legs with short ciliation. Claw formula, 0.0-0.0-0.0. 



Length : Body about 4 mm. ; wing 3.5 mm. 



The adults were taken in the daytime, flying in the forest. 



Eastern coast of Central America. Cacao, Trece Aguas, Alta Vera Paz, 

 Guatemala, March 25, 27, April 15, 1906 (Schwarz and Barber) ; Bluefields, 

 Nicaragua (W. F. Thornton) ; Port Limon, Costa Pica, September 28, 1905 

 (F. Knab). 



Wyeomyia homotina is allied to W. trinidadensis, but is specifically distinct. 

 It is an illustration of the diversity of the faunas of Central America and Trini- 

 dad, the latter possessing a fauna essentially Brazilian, the former having a 

 more endemic one. 



WYEOMYIA TRINIDADENSIS Theobald. 



Wyeomyia trinidadensis Theobald, Mon. Cullc, ii, 277, 1901. 



Wyeomyia trinidadensis Giles, Gnats or Mosq., 2 ed., 497, 1902. 



PJioniomyia longirostris Theobald (in part not Theobald), Mon. Culic, iii, 311, 1903. 



Phoniomyia longirostris Blanchard (in part), Les Moustiques, 425, 1905. 



Wyeom.yia longirostris Dyar & Knab (not Theobald), Journ. N Y. Ent. Soc, xiv, 



229, 1906. 

 Phoniomyia longirostris Coquillett (not Theobald), U. S. Dept. Agr., Bur. Ent., 



Tech. ser. 11, 27, 1906. 

 Phoniomyia trinidadens'is Dyar & Knab, Proc. Biol. Soc. Wash., xix, 141, 1906. 

 Phoniomyia longirostris Theobald (in part not Theobald), Mon. Culic, v, 576, 1910. 



Original Description of Wyeojiyia trinidadensis: 



Thorax deep brown, with bronzy scales. Abdomen black, with metallic green 

 reflections, basal white lateral spots, which often pass into basal bands, venter 

 white scaled. Legs long, black, the mid tarsi white above. Ungues small, equal, 

 simple. Proboscis as long or longer than the whole insect. 



5. Head covered with flat brown scales with metallic violet and sometimes green 

 reflections, sides with rather grey scales; around the eyes are short black bristles 

 projecting over them; eyes black and coppery, two long pale brown bristles project 

 from the head between them; antennae rather short, black, basal joints with a grey 

 sheen, almost white in some lights; palpi very short, covered with purplish-brown 

 scales; clypeus brown, with grey sheen; proboscis thin, very long, as long or longer 

 than the whole insect, deep brown with metallic reflection. 



Thorax deep brown, with flat spindle-shaped bronzy-green scales, which appear 

 deep bronzy in some lights; numerous deep brown and golden-brown bristles over the 

 roots of the wings; prothoracic lobes covered with flat scales, showing blue, violet 

 and ochraceous reflections, and a few forwardly projecting bristles; scutellum 

 densely clothed with flat bronzy scales, black when denuded; mid lobe with four 

 border-bristles, the two median ones crossing one another; metanotum nearly black, 

 with apparently three bristles in a row behind and two in front; pleurae brown, 

 densely clothed with flat white scales. 



Abdomen black, clothed with rather large flat black scales, which are more or less 

 metallic in reflected light, deep black in other lights; at the base of each segment is 

 a silvery-white scaled lateral spot, which on the last two segments form more or less 

 complete white basal bands; apical segment with black bristles; first segment brown, 

 with grey scaled sides; posterior border-bristles very short; venter densely clothed 

 with silvery-white scales. 



Legs with pallid ochraceous coxae, and covered with white scales, remainder 

 covered with deep blackish scales with metallic purple and bronze reflections; 

 femora white scaled beneath; hind metatarsi about one-third longer than the tibiae; 

 ungues equal and simple, very small; tibiae spiny; the first, second and third tarsi 

 of the mid legs are white scaled on one side. 



