of the Royal Physical Society. 279 



Acanthogenius, Reiche. 

 1. A. (Helluo) bimaculatus, Dej. 5. 402. 



Acanthogenius bisignatus, Reiche, Ann. Soc. Ent. France, ix. 334*. 

 Ater, punctatissinms \ labro rotundato, lsevigato ; elytris striatis, 



macula media rotundata pallide flavo-testacea ; tarsis rufo- 



piceis. 

 Long. 6 lin., lat. 2 lin. 



Brachinidae. 

 Pheropsophus, Solier. 



1. Ph. (Brachinus) marginatus, Dej. 1. 309. 



Capite testaceo, puncto verticis nigro ; thorace testaceo, mar- 

 gine antico posticoque nigris ; elytris costatis, nigris, sub- 

 parallelis, puncto humerali, margine laterali, fascia media 

 dentata abbreviata, apice, antennis pedibusque testaceis. 



Long. 7-8 lin., lat. 2f lin. 



2. Ph. minor, mihi. 



Capite testaceo, vertice et postice nigro ; thorace supra nigro, 

 vel nigro cum macula marginali testacea, subtus nigro, 

 margine testaceo; elytris costatis, nigris, postice latioribus, 

 interdum puncto humerali testaceo, inter dum sine puncto 

 humerali, cum macula media testacea dentata, apice leviter 

 testaceo ; pectore testaceo ; abdomine nigro ; antennis pedi- 

 busque testaceis. 



Long. 6J-4J lin., lat. 2J-2 lin. 



The smallest species of Pheropsophus with which I am ac- 

 quainted. Head and mouth testaceous, with the vertex and 

 back part black, smooth in front, with a shallow depression on 

 each side, faintly corrugated behind. Antennae long, reaching 

 to the middle of the elytra, fusco-testaceous, a little more dusky 

 towards the tip. The upper side of the thorax is black, but 



* Dejean's name bimaculatus has been changed by M. Reiche, as above 

 noted, into bisignatus, on the ground that M'Leay had previously occupied 

 the name in the allied genus Planetes by his species Planetes bimaculatus. 

 But I think this is carrying the dread of a double employment of names 

 to an excessive extent. Planetes is recognized as a good genus, distinct 

 from either Macrocheilus or Acanthogenius, and a repetition of the same 

 specific name in each does not seem to entail any great inconvenience 

 — certainly none so great as that of changing a well-known and established 

 name. 



