378 THE CANADIAN ENTOMOLOGIST. 



replace Brachypelta Am. & Serv., which has the same type and 

 the Cydnus of Fieber, Signoret, and Lethierry and Sevrin becomes- 

 Aethus Dall. with indicus Westw. as type. 



Subfamily Asopinae. — The synonymy of genus Asopus Burm. 

 is complicated by an uncertainty as to where it was first published. 

 Kirkaldy claims that it first appeared in Silbermann's Revue, and 

 therefore names gibbus Burm. ( = cayetnensis Lap.) as type, thus 

 making it synonymous with Discocera Lap., but Dr. Bergroth in 

 1911 (Wien. Ent. Zeit., XXX, p. 122) gives us a careful study of 

 the question, and concludes that we should accept argus Fabr. 

 (= malabaricus Fabr.) as the type of Asopus, and I do not see 

 that we can do better than to follow him. Where we cannot be 

 certain which of two names appeared first, it would seem best to 

 accept the one which least disturbs a long accepted synonymy and 

 gives us the most rational interpretation of the author's meaning. 

 By adopting the above synonymy we are able to retain the well- 

 known subfamily name Asopince. 



Genus Perillus Stal. — This genus was founded in 1862 as a 

 subgenus of Oplomus with the species confluens H. Sch., virgatus 

 Stal, and circumcinctus Stal, of which confiiiens has properly been 

 selected as type. I can see no justification for Schouteden's new 

 genus Perilloides, as it possesses no workable character except the 

 greater convexity of the pronotum, and I have not recognized it in 

 my catalogue. The sulcation of the tibiae differs inappreciably, 

 if at all, in the two genera. 



Genus Acanthocephala Lap. — The names Diactor Burm. and 

 Metapodius Westw. were both given as substitutes for Acantho- 

 cephala Lap., a name supposed at that time to be preoccupied by 

 a family of that name in the Vermes. By the International Rules 

 a family name cannot preoccupy a generic name and Acantho- 

 cephala is therefore valid. Metapodius has the same type as 

 Acanthocephala, and cannot therefore be used as a distinct sub- 

 genus as was done by Stal, and we must fall back on Metapodiessa t 

 substituted by Kirkaldy for this well-known North American sub- 

 genus. 



Genus Leptocorisa Latr. — So many changes have been made 

 in this genus that a word of explanation seems necessary. Latreille 



