94 Psyche [June 



convex; when scutellum is reduced in size and flattened, tibia; are strongly 



spinose 33 



33. Tibiae thickly set with long strong dark colored spines; corium narrow, acute 

 apically (fig". 20); ocelli present; rostrum 4-segmented; tarsi 3-segmented; 

 phytophagous (always?); generally shining black or blue, sometimes with 

 lighter peripheral markings; rarely brownish in color, in which case length 

 is less than 5 mm.; moderate to minute in size 



CYDmDM or THYREOCORID^ 

 Tibiae not strongly spinose; corium broad, obtuse at apex; ocelli present; ros- 

 trum 4-segmented; tarsi 3-segmented; phytophagous; gray, brown or red- 

 dish species; moderate in size SCUTELLERID.® 



NEW AMERICAN SPECIES OF ASTEL\ AND 

 SIGALSOESA.i 



By J. M. Aldrich, 



Assistant in Cereal and Forage Crop Insect Investigations, 

 U. S. Bureau of Entomology, 



The two genera named are readily distinguished from other 

 Drosophilidse by the shortness of the second longitudinal vein, 

 which surpasses the first but slightly, as the accompanying sketches 

 show. Asteia has been known from the time of ^Nleigen as a 

 European genus, of which four species are recorded in the Palee- 

 arctic Catalogue; it has no posterior cross-vein, and the arista is 

 plumose as in Drosophila. Sigaloessa was established by Loew for 

 a Cuban species S. bicolor (Centuries, VI, 100, 1865); it has a pos- 

 terior cross-vein, and the arista is only microscopically pubescent 

 in most cases, although in frontalis described below it is short- 

 plumose. 



The wing figured by Williston, Manual, 1908, p. 300, fig. 7, as 

 a doubtful member of Sigaloessa, belongs to a fly of another genus; 

 his figure on page 311, fig. 7, is correctly named as a Sigaloessa. 



The Asteia tenuis of Walker, Trans. Ent. Soc, n. ser., V, 331, 

 must belong somewhere else; he mentions the posterior cross-vein, 

 which being near the border would also exclude the fly from Siga- 

 loessa. Walker himself gave the genus with a question, but Osten- 

 Sacken dropped the interrogation point, perhaps only a clerical 

 error. 



1 Published by permission of the Chief of the Bureau. 



