DASYDACTYLITS. 19 



Mas prothorace convexo, antice angustato; pedibus anticis longis, femoribus intus asperatis, tarsis valde 

 hirtulis. 



Hah. Mexico, Cordova (Salle). 



Brassy above, the body beneath pitchy-black, the legs pitchy red ; antennge bluish- 

 black, the club (as in other species where no difference is specially mentioned) five- 

 jointed and duller than the basal joints, the seventh or first club-joint being much 

 narrower than those following and less pubescent. Head rather sparingly, the thorax 

 thickly and distinctly, punctured ; scutellum transverse. Elytra rather more distinctly 

 punctate-striate than in I), nitidus ; the sutural stria impressed more deeply at the 

 apex, but the apex itself is not so acuminate as in D. nitidus. Prosternum rather 

 broad, arcuate, its apex truncate but depressed. 



Three males from Salle's collection are all I have yet seen. 



Section B. Processu prosternali apice exciso. 



9. Dasydactylus thoracicus. 



Niger, supra seneo-micans, subtus cum pedibus piceus, bis geniculis tarsisque nigris ; capite prothorace sub- 

 tilissime parce punctulatis, fere glabris ; elytris basi quam prothorax haud latioribus, ad apicem valde 

 angustatis, apicibus truncatis et denticulatis ; prosterno leviter emarginato. Long. 10 millim. S • 



Mas prothorace quam elytrorum basis latiore, convexo ; pedibus longis, femoribus anticis et intermediis intus 

 asperatis. 



Hah. Mexico, Toxpam, Cordova (Salle). 



This species is distinguished among its very near allies by its rather short and convex 

 thorax being as wide as the base of the elytra in the male ; by the elytra being rather 

 distinctly punctate-striate, with the interstices sparingly but serially punctured, and 

 their apices obliquely truncate ; and by the prosternal process being arcuate and excised 

 at the apex (but not deeply), the margin being reflexed at the angles. In one example 

 there is what appears to be a stridulating file on the crown of the head, and this might 

 cause it to be referred to Crotch's genus Goniolanguria. This is not, however, to be 

 seen in other males ; and in other characters, as the structure of the legs and tarsi, the 

 absence of the asymmetrical gena, &c, it diverges from the type of that genus, which 

 has been but imperfectly characterized by Crotch. 



This insect perhaps comes nearest to D. punctistemum ; it is also closely allied to 

 D. hondoensis, though larger and blacker. 



10. Dasydactylus punctisternum. 



Niger, cseruleo-micans ; capite prothoraceque subtilissime minute punctatis, fere glabris ; elytris obsolete 

 punctulatis, apicibus rotundatis et vix denticulatis ; prosterno transversim rugoso, processu intercoxali 

 rugoso-punctato. Long. 9-11 millim. d 1 $ • 



Mas prothorace latiore et convexiore ; pedibus anticis et intermediis longis, femoribus tibiisque interne 

 asperatis. 



Hob. Mexico, Playa Vicente, Teapa in Tabasco (Hoge, Salle). 



D*2 



