2l8 ASHMEAD 



Type. — Cat. No. 5652, U. S. Nat. Museum. From Juneau, July 

 25. One specimen. 



In color and general appearance this species very closely resembles 

 Cosmoconus canadensis Provancher, and one must give the closest atten- 

 tion to its structural characters or it might be easily confounded with it. 



Genus Calliphrurus Forster. 



Prior to the Harriman Expedition only a single species belonging to 

 this genus was known in North America. 



In the Alaskan material ten additional species have been discovered, 

 which may be tabulated as follows : 



TABLE OF SPECIES. 



1. Head and thorax black. 



Abdomen not entirely black ; dorsal segments more or less rufous. 



8. 



Abdomen black or at most with only the extreme apex of one or 



more of the segments w^hitish or testaceous 2. 



2. All coxae black 3. 



Not all the coxae black 5. 



3. Smaller species, less than 6 mm. or no longer 4. 



Larger species, more than 6 mm. long. 



Legs rufous with the front and middle trochanters, the second joint 

 of hind trochanter, tibial spurs, palpi, tegulas, and ventral fold 

 yellowish-white ; coxae, hind femora, base and apex of their 

 tibiae and tarsi black. 



Abdomen above black with the apices of the second and third segments 

 nearly yellowish ; clypeus and mandibles yellow ; no spot in front of 

 each lateral mesothoracic lobe. Female C. clypeatus. 



Abdomen with dorsal segments 2 to 6 or 7, narrowly at apex flavo-testa- 

 ceous, the third and fourth usually also with a large median spot 

 toward apex; clypeus, mandibles and a spot on scape beneath yellow; 

 legs rufous. Male C. clypeatus. 



Legs rufous, with the trochanters, except first joint above ^ P^lpi? 

 tegul^e and ventral fold yellowish-white ; tibial spurs testa- 

 ceous ; coxae, basal joint of trochanters above, tips of hind 

 tibiae and tarsi black or fuscous. 



Clypeus, mandibles and a triangular mark in front of each lateral 

 mesothoracic lobe that extends slightly on to the angles of the middle 



lobe, yellow. Female C alaskensis. 



Clypeus, mandibles and tegulse yellow or yellowish ; mesonotum im- 

 maculate; flagellum, except two or three basal joints, ferruginous. 

 Female C. affinis. 



