NOMOTUS. 



25 



those of the other genera to which it bears any resemblance. From any species of 

 Dasydactylus, the absence of long hairs from the front tarsi, the thickened femora, 

 shorter legs, and more cylindrical form will sufficiently distinguish it ; the claw-joint of 

 the tarsi is also shorter. The antennse are rather longer than is the case with middle- 

 sized species of Dasydactylus ; the club, though large and rather heavy, is not distinctly 

 5 -jointed (the seventh joint is so little produced on its inner side as scarcely to 

 appear widened, and does not really form part of the club) ; and there is no trace of 

 any roughening of the femora. From Languria proper, such as L. Iceta, the denticu- 

 lation of the apex of the elytra is perhaps sufficient. 



1. Nomotus plutonus. (Tab. I. fig. 16.) 



Niger, nitidus, subcylindricus ; capite prothoraceque mirmtissime perobsolete punctatis, subglabris, hoc oblongo, 

 convexo, lateribus paullulum rotundatis ; elytris punctato-striatis, interstitiis fere laevibus, apicibus rotun- 

 datis et minute denticulatis, stria suturali ad apicem fortius impressa. Long. 9-10 millim. 



Hab. Panama, Bugaba {Champion). 



The colour of this species is wholly black above and beneath. The head and thorax 

 are very smooth and shining ; the latter rather convex, its sides rounded, widest about 

 the middle, the base with a strong transverse depression, the basal striolee short but 

 distinct, the space between the latter almost smooth and with only a very few obsolete 

 punctures. Scutellum orbicular, a little pointed behind. Elytra punctate-striate, the 

 interstices nearly smooth ; the sutural stria distinctly impressed as it approaches the 

 apex, but the depression not so deep as in the following species. The femora in what 

 I take to be the males of this species are very robust and distinctly clavate, especially 

 the front pair ; the tarsi also appear to be wider than those of the female, but the 

 difference is not so great as to render it absolutely certain that I can separate the sexes. 



Many specimens of this insect were secured by Mr. Champion at Bugaba. 



2. Nomotus SBnescens. 



Nigro-subaeneus, nitidus, subcylindricus ; capite prothoraceque crebrius minute et obsolete punctatis ; elytris 

 punctato-striatis, interstitiis minute punctulatis, stria suturali fortius impressa et sutura ad apicem 

 depressa : pedibus picescentibus. Long. 10-11 millim. 



Hab. Mexico, Cordova, Jalapa, Tapachula in Chiapas (Hoge) ; Guatemala, Zapote, 

 San Geronimo (Champion). 



Very close to N. plutonus, but rather larger, and with a brassy reflection which is 

 not present in that species. The whole insect is proportionally rather longer, the 

 sutural stria is more distinctly impressed, and the depression of the suture at the apex 

 is deeper. Other points of difference are the punctate interstices ; the finer punctures 

 of the strise ; and the thicker and more distinct punctuation of the thorax, especially at 

 the base, where the basal depression is usually covered with deep and coarse punctures 

 and sometimes even foveolate. 



biol. centr.-amer., Coleopt., Vol. VII., September 1887. E* 



