1921] NATURAL SCIENCES OF PHILADEPHIA. 93 



tibial tips concolorous, broadest on the posterior legs, wings with a 

 brownish tinge, the stigma with a pale center. 



MaZe.— Length 17.5-18 mm.; wing 22-24.5 mm. 



Fore leg, femm*, 13.6 mm.; tibia, 17.7 mm.; middle leg, femur, 

 16.3 mm.; tibia, 17.8 mm.; hind leg, femur, 16.4 mm., tibia, 18.6 

 mm. Frontal prolongation of the head light yellow above, includ- 

 ing the nasus; dark brown laterally; mouthparts dark brown, palpi 

 with the three basal segments light yellow, the terminal segment 

 abruptly dark brown with the extreme tip dull orange. Antennae 

 short, the scape yellow; flagellar segments bicolorous, the base of 

 each segment dark brown, the apex broadly yellow; terminal flagel- 

 lar segments more unicolorous. Head brown, more yellowish an- 

 teriorly, Mesonotal praescutum brown with four very indistinct 

 darker brown stripes, the intermediate pair very indistinctly sep- 

 arated from one another; an obscure yellow lateral spot on the sides 

 of the sclerite before the suture; scutal lobes dark brown, the median 

 area paler; scutellum and postnotum dark brown. Pleura light 

 brown, spotted with darker brown. Halteres brown, the knobs 

 darker. Legs w4th the coxae yellowish testaceous, the outer face 

 variegated with darker; trochanters yellow; femora dark brown, 

 the bases paler, the tips rather broadly (1.3 mm.) whitish yellow; 

 tibiae dark brown, the bases whitish yellow, co-extensive with the 

 pale femoral tips, the tips fading into dull yellow, narrowest (3.5 

 mm.) ori the fore legs, broadest (9 mm.) on the hind legs; tarsi dull 

 yellow. Wings with a strong brownish tinge, most intense in cells 

 C and Sc; stigma ocelliform, dark brown, the center pale, occupying 

 the end of cell 1st Ri; veins conspicuously seamed with brown; 

 veins dark brown. Venation: tip of Ri perpendicular to the re- 

 mainder of the vein; Sci long, extending almost to the tip of Ri; 

 Rs strongly arcuated at origin; deflection of 7?4+5 distinct; petiole 

 of cell Ml shorter than m; vein Syid A very short. Abdominal ter- 

 gites brown, the bases of each segment narrowly pale; sternites 

 obscure yellow, each sclerite with a linear black mark occupying 

 about the distal half of each segment. 



Habitat. — Peru. 



Holotype, d^, Yurimaguas, March 31, 1920 (H. S. Parish). 



Paratopotype, cf . 



Brachypremna basilica is one of the largest and most conspicuous 

 species of the genus yet described. In the pattern of the legs, it 

 closely parallels B. Candida Alexander, but in other respects the 

 two insects have little in common. 



Genus TANYPREMNA Osten Sacken. 

 1886. Tanypremna Osten Sacken, Biol. Cent. Am., Diiot., vol. 1, p. 19. 



Tanypremna longipes (Fabricius) 



1805. Tipula longipes Fabricius, Syst. Antl., p. 25. 



