1923] Studies in Asilidce (Diptera) 209 
Lateral pollinose marks of abdomen not extending across 
front part of segments 7 . 
5. Wings clouded on crossveins and furcations, base of second 
submarginal cell truncate and with a spur of a vein 6 . 
Wings hyaline, no spur at fork of third vein, anal cell 
closed and petiolate. (Cal.) clausa Coq. 
6. Anal cell open. (Cal.) trunca Coq. 
Anal cell closed in the margin; lateral pollinose marks of 
abdomen each with central black shining spot. (Cal.) 
highlandica Cole. 
7. Legs red; oral and trichostical bristles black. (Wash., Or., 
Wyo hrevicorriis Will. 
Legs entirely black 8 . 
8. Oral bristles black 9 . 
Oral hairs white 10 . 
9. Crossveins and furcations tinged with brown; pruinosity 
of thorax brownish, bristles pale, scutellar margin nar- 
rowly black and with six pale hairs ; abdominal segments 
scarcely pruinose at base. (Wash., Or.) . .scz’O^Za Will. 
Wings clear hyaline; pruinosity of thorax grayish, bristles 
black, scutellar margin broadly black and with two short 
black setae; abdominal segments with basal pruinose 
fascia. (Id.) 7nelanochceta, n. sp . 
10. Wings tinged with brown; mesonotum marked with brown 
broad geminate median stripe and lateral spots. (Mex.) 
pulchella Will. 
Wings nearly or wholly hyaline; mesonotal pattern nearly 
obsolete 11. 
11. Mesonotum nearly bare; pygidium white-pruinose. (Ariz.) 
fur Will. 
]\Iesonotum whitish pilose; pygidium polished, {cyrtopo- 
gona Cole) (B. C., Wash., Or.) albosetosa Time. 
The genus Cophura has been heterotypic, serving to combine 
various species that run to it in the keys, without regard to their 
phylogeny. The separation of Comantella helps to unify the 
group, but it is still diverse. The species are considered rare, 
only the type material being known of most of its forms. I 
