230 Journal New York Entomological Society. [^'°1- ^^■ 



Frontero (H. H. Smith) ; Vera Cruz, Medellin (H. H. Smith) ; 

 Isthmus of Tehuantepec (Sumichrast). Cent. Am.: Guatemala, An- 

 tigua (Eisen), Aguna (Eisen). Antilles: Trinidad (Busck), Cunapo 

 River, Trinidad (Williamson). Dutch Guiana (authority Osten 

 Sacken; Berl. Ent. Zeit., vol. 31, p. 239). Brazil: Para, Igarape- 

 Assii (Parish). 



B. dispellens is readily distinguished from all of its allies by the 

 uniform pale tibiae. Northern specimens (Georgia) seem to have the 

 coloration clearer cut, the pattern more grayish. Specimens from 

 Guatemala have the costal cell of the wings more yellowish-brown ; 

 cell R^ brown in the middle, paler along the costal margin ; the tibiae 

 and tarsi more yellowish-white, etc. However, the Brazilian material 

 shows almost the same type of coloration as the Georgia specimens 

 and the discrepancy in color must be attributed to the age of the 

 specimens and other factors. 

 Brachypremna breviventris Wiedemann. 



1821. Tipula breviventris Wied., Dipt. Exot., Vol. i, p. 43. 1828. Tipula brevi- 

 ventris Wied., Aussereur. Zweifl. Insekt., Vol. i, p. 47. 1886. Brachy- 

 premna breviventris Osten Sacken, Berl. Ent. Zeit., Vol. 30, p. 161. 1900. 

 Brachypremna breviventris Hunter, Trans. Am. Ent. Soc, Vol. 26, p. 285. 

 1902. Brachypremna breviventris Kertesz, Cat. Dipt., Vol. 2, p. 264. 

 Head : rostrum brown, shiny ; nasus black, tipped with yellow hairs ; palpi, 

 basal segment yellow ; second dark brown, tipped with pale brown ; remaining 

 segments dark brown. Antennae, basal four or five segments light yellow ; re- 

 mainder gradually darker, brown. Front light creani-color, vertex and occiput 

 brown with a sparse yellow bloom. 



Thorax: light brown, mesothoracic praescutum with a narrow brown stripe 

 on either side of the very narrow median pale stripe; a short broad dark stripe 

 beginning just behind the proximal end of the pseudo-sutural fovea, broadening 

 out behind, somewhat interrupted at the suture ; scutum dark brown on the 

 lobes, this color a continuation of the lateral praescutal stripes, scutum pale 

 medially; scutellum pale with a short, double, brown median line; post-notum 

 brown, with two narrow pale stripes on either side, these being a continuation 

 of the pale vittse on the scutellum. Pleurae brown anteriorly, the meso- and 

 meta-pleurae with a gray bloom ; the sclerites with brown margins giving the 

 pleurae a spotted appearance. Halteres : stem pale, knob brown. Legs : coxae 

 dark brownish with a large pale spot on the outer face ; trochanter yellow ; 

 femora light yellowish-brown, darkening at the tip to a brownish-black ; tibia 

 with the extreme base, abruptly yellowish-white; remainder of the tibiae dark 

 brown ; base of the metatarsus dark brown, concolorous with the tibia, the 

 remainder of the tarsi brightening to a yellowish-brown. 



Wings : costal cell brownish ; remainder of the wing sab-hyaline ; cell R^ 



