458 AMERICAN HYMENOPTERA. 



of a specimen from Berg Bay, Alaska (a specimen obtained 

 by the Harriman Alaskan Expedition, in the collection of the 

 American Entomological Socity). Mr. Swenk (Ent. News, 

 July, 1907, p. 297) reports the species from Sioux County, 

 Nebraska. It is evidently a Boreal and Transition species 

 and is extremely rare in the East, but rather common in the 

 West. More extensive collecting will certainly greatly in- 

 crease our knowledge of the habitat of this species. It is 

 pretty certainly present in parts, at least, of Wyoming and 

 Idaho and in North Dakota, Minnesota, Wisconsin and 

 Michigan, and in the Canadian provinces to the north of these 

 latter states. 



This species has its closest ally in bicolor, laboriosus and 

 variabilis being, in order, the next nearest related forms. It 

 may be separated from bicolor and variabilis by the differ- 

 ence in the coloration of its metapleura and from laboriosus 

 by means of the differences in coloration of the dorsum of 

 the thorax and abdomen. 



I believe this species is the female of consultus. While I 

 have seen no specimens of consultus from the East, it must 

 be remembered that insularis is very rare here. I believe 

 that cojisultus will yet be found to be present in the East, 

 extreme rarity accounting for its absence from the collections 

 which I have examined. It is just possible, also, that the 

 very few specimens of insularis which I have seen, supposed 

 to have been collected in the East, have by some mistake 

 been given incorrect locality labels. 



This species closely resembles the female of campestris, as 

 Cresson and Handlirsch have stated, but the hind metatarsi 

 of campestris are noticeably shorter for their width than are 

 those of this species, and the lateral carinse of the hypopy- 

 gium of campestris are much more strongly elevated and 

 evenly rounded from front to rear. I have carefully compared 

 specimens of campestris, labelled by Schmiedeknecht, with 

 specimens of both insularis and latitarsus. 



The name interruptus, given by Greene, cannot properly be 

 used for this species, as Cresson has shown, because the 

 same name was used by Lepeletier for another species of 



