144 SEEEICOENIA. 



This insect exactly resembles P. dubius, but is a trifle larger. It is only distin- 

 guishable by the male-characters. The terminal segment of the abdomen has a rather, 

 wide V-shaped incision in the middle, with a very strong tooth on each side of it, next 

 to which is a less strong and slightly shorter tooth, and on the outside a small acute 

 tooth at a lower level (fig. 7). 



A single example from each of the above localities. 



15. Pachyschelns purpureipennis. (Tab. VIII. fig. 8.) 



Ovatus, post medium angustatus, nitidus, subtus niger : capite thoraceque nigris vel seneis, elytris purpureis. 

 Long. 1| lin. 



Hah. Panama, Bugaba, Volcan de Chiriqui 3000 feet (Champion). 



This species resembles P. diversus in form ; it is perhaps a little less narrow, but is 

 narrower than P. octodentatus and less angular at the sides. The head and thorax are 

 uniform black or brassy ; the latter is rather smooth in the middle, vaguely punctured 

 at the sides with fine and larger punctures, but without the rugosity present in P. octo- 

 dentatus. The elytra are purple, and are moderately finely punctured. The terminal 

 segment of the abdomen of the male has eight nearly equidistant teeth arranged in a 

 curve as in P. octodentatus, but the central pair are a little larger (not longer) than the 

 outer ones (fig. 8). 



A single example from Chontales appears to be referable to this species. 



16. Pachyschelus ardens. (Tab. VIII. fig. l.) 



Oblongo-ovatus, nitidus, subtus niger ; capite thoraceque viridi-aureis, hoc medio cuprescenti, fortiter discrete 



punctato ; elytris cyaneis vel purpureis, punctatis, post medium arcuatim attenuatis. 3 $ . 

 Long. 1£ lin. 



Hab. Mexico, Cordova (Salle). 



This species is more elongate and more oblong than any of the preceding. The 

 thorax is less narrowed in front; the posterior angles are less directed backwards, 

 slightly blunted at the point, and projecting slightly beyond the shoulders of the elytra 

 and not fitting close to them ; the surface is nearly smooth^ with some slight rugosity 

 only close to the margin ; the punctures are very distinct and are not placed near 

 together. The elytra are relatively longer, and less obliquely attenuated at the apex. 



The male has the terminal segment of the abdomen obliquely narrowed, the apex 

 with eight short teeth arranged in a slight curve, the middle ones a little larger than 

 the outer ones (fig. 1). 



Two examples, male and female, received with the above, differ from the type in 

 having the head and thorax nearly black and the elytra brownish-brassy. The terminal 

 segment of the abdomen of the male is unfortunately asymmetrical, and I am therefore 

 unable to say what its normal form would be. 



