INSKCUTOR INSCITI^ MENSTRUUS 123 



Barberiella chllosioides, new species. 



Male. Rather small, but fairly robust species; shining black, 

 with a steel blue reflection on abdomen ; pile everywhere black 

 except on anterior corners and lateral margins of abdomen 

 where it is luteous. 



Frons flattened, rugulose, with a shallow, median, longitudinal 

 impression ; face clothed with black pile from base of antennae 

 to oral margins except for a broad bare median patch ; epistoma 

 small, well rounded, situated about its own length above the 

 frontal oral notch. Face noticeably longer than broad and, in 

 line with base of tubercle, very slightly and evenly concaved 

 from antennae to oral notch. Pile on scutellum fairly long, 

 longer and coarse on the margin. Pleurae with fairly long 

 dense pile. Middle and hind coxae with strong, black pile. 

 Squamae, squamal cilia and halteres brown. Length 7.5 mm. ; 

 wing 6.5 mm. 



One male, Eureka, California, June 2 (H. S. Barber). 



Type.— Cat. No. 25387, U. S. Nat. Mus. 



Barberiella versipellis Will, (described as a species of Chilosia 

 by Williston) is very closely related. It dififers in having the 

 face nearly as broad as long, deeply concaved between epistoma 

 and tubercle ; facial pile shorter and more scattered. Wings 

 smoky. Genitalia styles longer and narrower. 



These two species form a unique group in Chrysogaster. 

 They approach Chilosia very closely and as all of their char- 

 acters, except the rugulose patches on the face, the bare frons 

 and flat abdomen, seem to be repeated in one or another of the 

 species of Chilosini it is rather difficult to separate them. The 

 general habitus allies them much more to Chrysogaster. More- 

 over, the females probably will prove to have no tubercle on 

 the face, another character which would ally them to Chrys- 

 ogaster. In fact a female specimen determined as Chrysogaster 

 lata Loew and compared with the type of that species by 

 Williston may prove to be the female of B. versipellis Will. 

 This specimen was characterized in my paper on Chrysogaster 

 (Proc. Ent. Soc. Wash., 1015) as "Group 3." The males of 



