178 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. Ill 



dible without medial expansion in region of penicillus (thus differ- 

 ing from A. cucullatus group, fig. 35, a). Without setae on ventral 

 surface of basal segment of labial palpus. Up to 5 spinelike setae on 

 each episternum of mesothorax and metathorax. Abdominal medio- 

 tergites (fig. 36, c) with impressions of variable length, sometimes 

 appearing to extend to middorsal suture on second to fifth segments, 

 but usually difficult to distinguish impressions from confluent ad- 

 joining pits; from 6 to 10 setae in posterior transverse row, usually 

 some arranged in pairs. 



Material used in the study of the group. — A. undulatus (DeGeer) : 

 Four larvae from Finland were examined. The larva of this species 

 has been known in Europe for many years and the writer believes 

 that this material is reliably identified although probably not directly 

 associated with reared specimens. (C.N.C. and U.S.N.M.) 



A. villosus (Geoffroy) : Four specimens from Denmark were ex- 

 amined, including the exuvium of one specimen said to have been 

 reared. The adult of this specimen was not available to the writer, 

 but the label stated "adult det. by August West." It is also known 

 that August West (1937, p. 484) has reared the larva of Athous 

 villosus from Dyrehaven, Denmark. 



i; Bognaes, Denmark; (no date); reared; J. P. Kryger (U.S.N.M.; adult 

 probably in A. West's collection, Denmark). 



Other specimens examined are deposited in the Canadian national 

 and the U. S. National Museum collections. 



Genus HEMICREPIDIUS Germar 



Figures 12, d, f; 37, a-c 



Species of H eniicrepidius are commonly recorded in the older 

 North American literature under the generic name Asaphes Kirby. 



Characters of this genus have been based upon the larvae of //. 

 memnonius (Herbst), H. hemipodus (Say) (= decoloratus Say), 

 H. bilobatus (Say), H. carbonatus (LeConte), and a larva, the 

 reared adult of which was identified as "Hemicrepidius sp. near 

 carbonatus (LeConte)." Larvae of the European Athous niger 

 (Linnaeus) and a larva which might be Athous hirtus (Herbst) 

 have been included with Hemicrepidius in the present discussion 

 since these possess typical Hemicrepidius characters. 



H. hemipodus and H. carbonatus are the only American species 

 that have been collected in numbers suitable for adequate character- 

 ization of their larvae. Other species seem to be rare, with the re- 



