Vol. XXXI ] ENTOMOLOGICAL NEWS 73 



Holotype: 9 , Parintins, October 3, 1919 (H. S. Parish). 



Gnophomyia bisecta is closest to G. pervicax Alexander 

 (Peru) from which it differs in the single praescutal stripe, the 

 wing-pattern and the details of venation. 



Psaronius pallipes sp. n. 



Head light brown with a darker median line; mesonotal praescutum 

 light brown with three dark brown stripes; metatarsi whitish; wings with 

 a strong brown tinge, the veins conspicuously seamed with dark brown; 

 cell 2nd Ri of nearly uniform width for its entire length. 



9. Length 20-20.5 mm.; wing 14.5-15 mm.; abdomen alone 16.5 mm. 

 Rostrum and palpi dark brown. Antennae with the scapal segments 

 light brown; flagellum dark brown. Head light brown; a rounded, dark 

 brown spot on the vertex b tween the eyes; a brown median stripe. 



Mesonotal praescutum light brown with three conspicuous darker brown 

 stripes; median stripe split for about the anterior half by a still darker 

 brown capillary line; pseudosutural foveae dark brown; scutum brown, 

 the lobes darker brown; a small dark brown spot at the end of the trans- 

 verse suture; scutellum and postnotum light grey with a capillary brown 

 median vitta. Pleura light grey, indistinctly marked with brown. 



Halteres dark brown ; basal half of the stem pale. Legs with the coxae 

 and trochanters pale brown; trochanters pale brown; femora and tibiae 

 obscure yellow, the tips narrowly dark brown; metatarsi whitish, the tips 

 and the remainder of the tarsi dark brown. 



Wings with a strong brown tinge, the costal cell darker, the subcostal 

 cell more yellowish; small dark clouds at the origin of Rs, fork of Rs, 

 fork of /?>+ 3 ; longitudinal veins with distinct, broad seams; wing-margin 

 broadly infuscated; wing-base proximad of arculus darkened. Venation 

 very similar to P. obscurus, differing as follows: R running almost parallel 

 to Ri so cell 2nd RI is of almost uniform width to the margin; fusion of 

 Cui and M 3 slightly more extensive, 



Abdomen dark brown, the tergites darker medially; sternal valves of 

 the ovipositor almost black. 



Holotype: 9 , Prata, June 30, 1919 (H. S. Parish). 



Paratopotype: 9 , July 5, 1919. 



Psaronius pallipes is one of the medium-sized species of 

 this interesting Neotropical genus. By means of the author'^ 

 key to the species of Psaronius (Trans. Am. Ent. Soc., vol. 40, 

 p. 250; 1914) this fly would run to P. fuscipennis Alexander, 

 a larger fly with the coloration and wing-pattern distinct. 

 Attention should perhaps be called to the fact that the abdo- 

 men is very long and contributes most to the length of the in- 

 sect; lor this reason a better idea of size is conveyed by the 

 length of the wing. 



