THE CANADIAN ENTOMOLOGIST. 127 



Though the genus has but recently been treated monographically, 

 after disposing of geminatiis and a/iernans, it was thought it might be 

 useful to state briefly the characters assigned to the other species, as in 

 all probability the large majority of the readers of the Canadian 

 Entomologist will never see the memoir alluded to. 



The genus Lepyrus affords grand opportunities for the creation of 

 species to entomologists who form them on the same basis as those of 

 rocks and minerals. 



THE MALE OF MONODONTOMERUS MONTIVAGUS, ASHM. 



$ . — About 4}4 mm. long, moderately dull brassy-green (about the 

 colour of some species of Dolichopus, which it superficially resembles); 

 third abdominal segment above blackish ; tips of femora, and whole of 

 tibiae and tarsi, reddish-ochreous. Wings hyaline, veins dark brown. 

 Antennae black, scape greenish. Head rather finely punctate, rather 

 broad, eyes prominent, vertex somewhat flattened. Antennas rather short, 

 scape very peculiar, irregularly reniform, the distal swelling largest ; 

 flagellum uniformly cylindrical, except the tip, ,;which is transversely 

 flattened. Thorax narrow, strongly punctate. Pafapsidal grooves deep 

 and complete. Scutellum with a transverse furrow, and its posterior 

 margin occupied by a ridge which is foveolate above. Tegulae green. 

 Stigma bifurcated ; post-marginal vein nearly twice as long as stigmal. 

 Posterior femora beneath very finely denticulated, with one large tooth 

 about the beginning of its distal fifth. Abdomen narrow, shining ; first 

 segment smooth on dorsum, remaining segments finely transversely 

 striate. Second segment extremely narrow on dorsum. 



Hab. — On leaf of Fopuius, sp., campus of N. M. Agricultural 

 College, Las Cruces, N. M., May 8, 1895. (Ckll. 2945.) 



This species was described from a ? taken by the writer at West 

 Cliff, Colorado. The $ , now first described, seems to differ considerably, 

 and I should never have referred it to the same species, but for the fact 

 that Mr. Ashmead assures me that the identity is certain. According to 

 Howard's synopsis of the genera of Chalcididas, it would not go into 

 Monodontomerus, which has the posterior femora smooth beneath, except 

 for the large tooth. The insect is a parasite of wild bees. 



T. D. A. COCKERELL. 



