18 



respect approaches Donacia or Macroplea, the only remarkable cha- 

 racter being the dentate femora. The head and eyes are dark brown : 

 the antennae are annulated, the basal portion of each joint being pale 

 testaceous, the apical portion dark brown : the prothorax has a dark 

 longitudinal line commencing at its anterior margin ; towards the cen- 

 tre of the prothorax it expands and divides, the branches afterwards ra- 

 ther approximating, and both of them reaching the posterior margin : 

 on each side of this median line is a short, dark brown line, commen- 

 cing, like the first, at the anterior margin of the prothorax, and not quite 

 attaining half its length, when it nearly meets a shorter line proceed- 

 ing from the posterior margin : on the middle of each side of the 

 prothorax is a dark but ill-defined spot : the elytra are testaceous, va- 

 riously but very indistinctly clouded with darker shades : the legs are 

 very pale and almost transparent, with the exception of the exterior 

 portion of the femora, which is dark brown : the entire under sm-face 

 is very pale. 



Genus. — Thia, Newman. 



Caput pronum, prothorace latins; oculi maximi, ad antennanim 

 basim profunde emarginati, in verticem fere conniventes; antennae 

 graciles, hirsutae, corpore duplo longiores, lO-articulatae, articuli lon- 

 gitudine fere aequales, ultimo breviori excejDto ; articulus 2us aut mihi 

 invisus aut caeterum more elongatus : prothorax fere cylindraceus, la- 

 teribus paullo convexus : elytra linearia apice rotundata, abdomine 

 breviora: pedes simplices, femoribus haud tumescentibus. 



Thia pnsilla. Testacea; oculis nigris, antennis fuscis : prothorax 

 fiiscus, Hneis 2 longitudinalibus anticis testaceis : elytra pallide 

 testacea, humeris, fascia pone medium undata, apicibusque fus- 

 cis. (Corp. long. '2 unc. lat. "05 unc. Antennarum dilat, '8 unc.) 



Inhabits North America. Two specimens taken by Mr. Doubleday 

 in East Florida, are in the cabinet of the Entomological Club. 



G. N. — Callidio affine. 



limmn. Caput poiTectum, punctum, testaceum, vertice fdscum ; 



oculis elongatis, subtus dilatatis, nigris ; antennae coi*pore vix 

 breviores, 11-articulatae, articulis basi pallidis apice fuscis: pro- 

 thorax capite longior vix latior, testaceus, dorso glaberrimus, 

 lineis 3 elevatis fuscis instructus, lateribus ante medium gibber, 

 postice valde restrictus : elytra glabra, lutosa, lineis 4 obliquis 



