THE CANADIAN ENTOMOLOGIST. 135 



I have placed in this subfamily the very rare genus Chirodamus, 

 Haliday, discovered by Charles Darwin, in South America, during his 

 memorable voyage in the Beagle. 



It was unknown to Kohl, while Dr. von Dalla Torre, evidently 

 without an examination of a specimen, has placed it, in his Catalogus 

 Hymenopterorum, as a synonym of Pompilus, Fabr. 



Fortunately, I have recognized this rare genus among some material 

 collected in 1888 by the U. S. Fish Commission steamer, Albatross, in 

 South America, in the same locality, Strait of Magellan, in which 

 Darwin took his single specimen 87 years ago. 



The U. S. Fish Commission took three perfect specimens, and this 

 seems to be the first time it has been taken since the single specimen taken 

 by Darwin. 



Table of Tribes. 



1. Wings extending to or beyond the tip of the abdomen, the cubitus in 



hind wings originating before the transverse median nervine 2. 



Wings somewhat abbreviated, hardly extending to the tip of the 

 abdomen, the cubitus in hind wings interstitial with the transverse 

 median nervure. 



Eyes not extending to the base of the mandibles, a wide space 

 between ; front femora abnormally swollen, with fascicles of 

 hairs beneath, the tarsi short Tribe I., Chirodamini. 



2. Eyes long, extending to the base of the mandibles or very nearly, 



at most with only a linear space between ; front femora normal, not 

 much swollen, the tarsi long Tribe II., Notocyphini. 



Tribe I. — Chirodamini. 



To this tribe belongs but a single genus — Chirodamus, Haliday. It 

 may be recognized by the characters made use of in defining the tribe, but 

 I add a few more : 



Labrum prominent, subconvex, semicircular, front tarsal joints 2-4 very 

 short ; the hind tarsi very long, much longer than their tibiae, man- 

 dibles long, pointed, edentate ; scape of antennae stout, as long as 

 the first joint of the flagellum ; prothorax rather long and wide ; 

 metathorax short, truncate posteriorly ; claws with a median tooth 

 beneath, ciliate ; maxillary palpi 6-, labial palpi 4- 



jointed Chirodamus, Haliday. 



(Type C. Kingii, Haliday.) 



