2 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 77 



ment of Agriculture. A careful study of this material together 

 with the National Museum specimens studied by Rohwer is the basis 

 of this paper. 



I am forced to the conclusion that the females referred by the 

 three authors to two species really include five species, inelli'pes 

 (Say), canadensis Provancher, vicimjbs Cresson, and two undescribed 

 species. In addition I find a sixth apparently distinct species, 

 which none of the three other authors has seen. 



The unique type of alhotibialis Bradley I have not seen, nor have 

 I found any specimen that agrees entirely with the description. It 

 seems probable, however, that it comes within the range of varia- 

 tion of the species that I am calling canadensis. 



Since Eohwer has designated a neotype for mellipes I here accept 

 that specimen as typical of the species. I have had no opportunity 

 to examine the type of canadensis, but for the purpose of this paper 

 I am accepting as that species the one represented by the majority 

 of the specimens assigned to it by Rohwer, although, as will be 

 pointed out later, there is some doubt of the correctness of the deter- 

 mination. I am in accord with Bradley as to the identity of the 

 female of vicinus. 



My thanks for the loan of material and permission to retain certain 

 .specimens are hereby extended to those in charge of the collections 

 of Cornell University, the Boston Society of Natural History, the 

 Canadian National collection, and the Pennsylvania State Depart- 

 ment of Agriculture. 



KEY TO THE NORTH AMERICAN SPECIES 



1. Abdomen red, petiole sometimes blackish 2. 



Abdomen black, rarely more or less reddish 7. 



2. Legs entirely black ; apical joint of hind tarsus fully twice as long as third 



joint atripes Rohwer (female). 



Legs largely red 3. 



3. Thorax strongly depressed; petiolar area barely a third as long as dorsal 



face of propodeum and nearly vertical ; legs with very long hair in addition 



to the short pile ; ovipositor much longer than body bicolor Cresson. 



Thorax not or barely depressed ; petiolar area much more than a third as 

 long as dorsal surface and oblique ; legs with long hairs at most on coxae 

 and trochanters; ovipositor at most slightly longer than body 4. 



4. Coxae and trochanters black or piceous 5. 



Coxae and trochanters red 6. 



5. Propodeum without distinct apophyses ; ovipositor as long as body. 



abdominalis Cresson. 

 Propodeum with distinct apophyses ; ovipositor distinctly shorter than body. 



brevicaudus, new species. 



6. Lateral impressions of pronotum not foveolate ; cephalo-caudad length of 



temple about equal to that of eye strangaliae Rohwer. 



Lateral impressions of pronotum strongly foveolate ; cephalo-caudad length 

 of temples distinctly greater than that of eye__dichro-a5 Rohwer (female). 



