305 



Genus. — Spalacopsis, Newman. 



Antenna) corpora fere longiores, basi approximatsD, [viventis recte 

 porrectffi), 11-articulatoe, articulo Imo elongato, incrassato, ca^teribre- 

 viores, pilosi : oculi laterales, parvi, rotundi, antennis distantes : ca- 

 put, prothorax et elytra latitudine fere a3qualia, linearia : prothorax 

 omnino inermis : pedes brevissimi ; femoribus paullo tumidis. 



1. Spalacopsis Siellio. Antennae corpora paullo longiores, manifesto 



pilosae, articulo Imo capite cum protliorace fere longiori, apice 

 incrassato : elytra prothorace paullo latiora, strio-puncta : mu- 

 rina, colore saturation varia. (Corp. long. '4 unc. lat. "05 unc.) 

 Inhabits Brazil. 



2. Spalacopsis stolata. Antennae corpore paullo breviores, vix pi- 



loses, articulo Imo capite longiori, toto incrassato : elytra am- 

 pla ; basi protliorace baud latiora : murina, vitta elytrorum 

 fusca valde irregulari : elytra strio-puncta. (Corp. long. '35 

 unc. lat. '045 unc.) Inhabits E. Florida. 



3. Spalacopsis suffusa. Antennce corpore baud longiores, vix hir- 



sute : cana, fere concolor, ca^tera S. stolatce. (Corp. long. 

 •2 unc. lat. "025 unc.) Inhabits E. Florida. 



Edward Newman. 



Art. LXXXI. — Varieties. 



148. Note on Adelotopus. Antemice almost quite glahrous : tarsi 

 compressed, Sfc. : ergo Hydradephagous, and retaining the characters 

 peculiarly adapted to a watery habitat, while deserting that medium. 

 E converso, the most amphibious Carabideous genus Omophron, ap- 

 parently more aquatic than Adelotopus, retams the terrestrial chai'acters 

 of pubescent antenna? and subcyliudric tarsi (as well as the advanced 

 mouth in a considerable degree).* First and second ventral segments 

 connate; second and third articulating'? This character should 

 come first, but unluckily it is one not always to be satisfactorily ascer- 

 tained without relaxing and dissecting the specimen. If my repre- 

 sentation is correct, it differs both from Gyrinida? and Dyticidae : and 

 in connexion with other points I estimate the difference as conclusive 

 against the former family. With respect to the latter, the variable 



* Quaere, whether the proper habitat of the insect be ascertained ? We meet with 

 Dyticidse and other aquatic insects under temporary shelter sufficiently remote from 

 water. May not Adelotopus frequent the mud on banks of pools ? 



2 B 



