116 PROC. ENT. SOC. WASH., VOL. 21, NO. 5, MAY, 1919 



cocoon, March, 1910, by T. D. A. Cockerell; paratype a reared 

 from a Rogas cocoon, April 17, by E. A. Popenoe; and paratype b 

 from Lake Forest, Illinois, August 4, 1899, and bearing the label 

 "Ceph. occ." (Cephus occidentalism). Both paratypes are prac- 

 tically like the type. The two paratypes are labelled in Ash- 

 mead's hand as belonging to his genus Neopimpla, the unde- 

 scribed type of which was from South Africa. If arbitrarily 

 placed in the Ichneumonini the species will run by default to 

 Neopimpla, but to me it has neither the characters nor the general 

 appearance of the Ichneumonini, but is distinctly Cryptine. 



Genus Atopognathus, new genus. 



In existing keys this very peculiar genus can run nowhere 

 except to the Mesoleptini, where, in venational, body, and, leg 

 characters, it is very similar to Ecbylus Holmgren as represented 

 especially by pleuralis (Provancher) and perennis Davis, both 

 of which differ from the genotype, Eclytus ornatus Holmgren, 

 in lacking the second intercubitus. But the head is much more 

 like that oilschnopsidea Viereck (== Ischnus Authors, not Graven - 

 horst), Heterischnus Wesmael, and Oronotus Wesmael. In short, 

 it apparently stands between the Phaeogenini and the Mesoleptini 

 as now constituted. In the Phaeogenini, because of the obtuse 

 abdomen and upcurved ovipositor, it agrees best with Heter- 

 ischnus, but the abdomen is really very different in form, the 

 antennae are much longer, and it differs in many other respects 

 from specimens of Heterischnus rnfipcs Wesmael as determined 

 by Schmiedeknecht. 



For the present, in view of its closer agreement with the 

 Mesoleptini on the characters usually used in keys, it seems 

 better to assign Atopognathus to that tribe, in spite of the very 

 anomalous mandibles. 



Head broad behind eyes; eyes slightly convergent below; clypeus sube- 

 marginately truncate at apex, subconvex, separated from the face by a shallow 

 groove; mandibles sickle-shaped, edentate at apex, but with a large, strong 

 tooth on inner margin; antennae filiform, about as long as body, flagellum 

 about 25-jointed, basal joints several times longer than thick, the joints 

 gradually decreasing in length until near the apex they are only about twice 

 as long as thick, female with a white annulus embracing joints 9-12; thorax 

 nearly as in Eclytus Holmgren; notauli and sternauli distinct; scutellum 

 elevated; propodeum completely areolated, the areola broad: venation as 

 in Eclytus except that the second intercubitus is lacking and radius originates 

 beyond middle of stigma; legs as in Eclytus with basal joint of front trochanters 

 and basitarsus of all legs very long, the latter nearly or quite as long as other 

 joints combined, tibial spurs small; abdomen similar to that of Eclytus but 

 first tergite narrower, slightly decurved, and with the spiracles strongly 





