OF WASHINGTON, VOLUME XVII, 1915 141 



with the carinse weaker, the areola open behind, legs with the 

 colors of the tibiae, especially of the middle legs, more contrasting, 

 tergites 1 and 2 relatively wider. 



Xenoschensis gracilis n. sp. 



Female. Length 11 mm.; antennae 8.5 mm.; ovipositor barely exserted. 

 Differs from slossonce, described above as follows: clypeus somewhat 

 shorter; face uniformly densely punctate; flagellum 33-jointed; propodeum 

 not gibbous above, without carinse except lateral carina: at apex, smooth 

 and impunctate, spiracle round; nervellus broken below the middle; abdo- 

 men wider than deep, polished, sparsely, weakly punctate; tergites relatively 

 longer, the first about half as wide as long and without dorsal ridges though 

 with a weak median furrow, spiracles at middle, fifth nearly as long as fourth ; 

 hypopygidium not reaching apex of eighth tergite. 



Black; clypeus and mandibles whitish; tegulse and wing bases pale fusco- 

 testaceous; legs rather pale testaceous, hind femora apically and their 

 tibise and tarsi throughout blackish; otherwise as in slossonce. 



Type locality: Franconia, N. H. 



Other locality: Banff, Alberta, Canada. 



Type: Cat. No. 19303, U. S. N. M. 



Two specimens, the type collected by Mrs. Slosson and the 

 paratype without other label than the number 458. 



The paratype differs from the type in no way except that the 

 areolet is somewhat petiolate. 



Prosmoridea, new genus. 



The sinking of Prosmorns (Foerster) Thomson into synonj'my 

 with Xcnoschesis Foerster leaves Pro*t//<>rus (Foerster) Davis 

 without a name. It is for this that I suggest the above name, 

 designating as the genotype Proxmuru* elongatus Davis. It 

 differs from Xenoschesis in having the propodeum completely 

 areolated, the apical carina tuberculate above on each side, in 

 lacking the emargination of the eighth tergite in the female, and 

 in having the sheaths of the ovipositor very broad. It resembles 

 in habitus much more closely ('/</<i/>/inintx and IlancJius and should 

 probably be placed with the Banchini rather than with the Meso- 

 leptini. From the two banchine genera mentioned it differs 

 in the complete areolation of the propodeum, the strong prepectal 

 carina, the small oval propodeal spiracle, the petiolate first tergite 

 with its spiracle at about the middle, the position of the fracture 

 of the nervellus which is at or belinv Ihe middle, the simple claws 

 in the female, and from Cidaphrurus by lacking the scutellar 

 thorn. In Foerster's table it runs to J><n/<-/i /*. 



