JOURNAL OF ENTOMOLOGY AND ZOOLOGY 231 



1. Second s. m. a little broader above than below; apical plate 

 of abdomen broad at end; hair on outer side of hind basi- 

 tarsi scanty and rather short. birkmanniella Ckll. 



Second s. m. narrower above; apical plate of abdomen narrow 

 at end; hair on outer side of hind basitarsi abundant and 

 long. poviona Ckll. 



Diadasia crassicauda sp. n. 

 $ Length about 10 mm. ; black, with abundant though not very 

 dense grayish-white hair; eyes narrow, grayish-green; face broad; 

 clypeus shining, with fine punctures; flagellum entirely black; meso- 

 thorax shining, with small punctures very sparse on disc posteriorly; 

 area of metathorax microscopically sculptured, with an opaque 

 median sulcus; tegulae reddish brown, blackened anteriorly; wings 

 hyaline, slightly reddish; legs black, with long white hair, small 

 joints of tarsi obscurely reddish; hind basitarsi gently curved, but 

 not produced at end; first two abdominal segments with long loose 

 pale hair, the others with appressed hair, and segments 2 to 6 with 

 narrow white marginal bands; apex of abdomen bilobate, the lobes 

 large and blunt, covered with very pale ochraceous hair except 

 at the ends, which appear black; stipites with long red hair on 

 posterior margin. 



Hah. — Laguna, California {R. La FoUette, B 7). Allied to 

 D. spharalcearum Ckll., but larger, with very much broader lobes 

 at end of abdomen, those of spharalcearum being spine-like. It 

 does not seem probable that this is the male of D. albovestita 

 Provancher. 



Exomalopsis nitens sp. n. 

 9 Length about or nearly 7 mm. ; robust, black, mandibles dark 

 red in middle, flagellum ferruginous beneath except at base; hair 

 of head and thorax rather long, dull white, pale ochraceous dor- 

 sally; head and thorax shining, finely punctured; tegulae piceous; 

 wings grayish hyaline, nervures dark, stigma sepia; legs black, with 

 small joints of tarsi ferruginous ; scopa of hind legs large and beauti- 

 fully plumose, dull whitish on tibia, gray (variably dark) on tarsi; 

 first abdominal segment shining, the basal declivity bounded above 

 by a distinct rim, the hind margin at each side with a broad, dense 



