138 SERKICOBNIA. 



y 2. Pachyschelus compactus. (Tab. VII. figg. 15, 15 a *.) 



c? . Breviter ovalis, eonvexus, niger, iritidus ; capite thoraceque nigro-cyaneis ; elytris cyaneis vel purpura- 

 seentibus, punctatis ; abdominis apice dentibus brevibus truncatis sex vel septem armato. 



$ . Capite thoracisque lateribus aureis vel cuprescentibus ; thorace medio scutelloque nigro-cyaneis vel 

 purpureo-nigris ; elytris cyarieis. 



Long. 1 lin. 



Eab. Panama, Bugaba 1000 feet, Volcan de Chiriqui 2500 to 4000 feet (Champion). 



This is a short oval species, only a little more narrowed behind than in front. The 

 head has some distinct punctures scattered over the surface. The thorax, when seen 

 under the microscope, has extremely fine coriaceous sculpture, with somewhat large, 

 but very shallow, punctures here and there; these large punctures are scarcely 

 noticeable in the male, but are a little more conspicuous and more numerous at the 

 sides in the female. The elytra at the humeral callosity are a trifle wider than the 

 base of the thorax, very slightly narrowed to the middle and then more rapidly 

 narrowed to the apex, with no angulation at the side ; they have the basal half 

 distinctly punctured, the punctures ranging themselves in lines ; the apical area has very 

 vague punctuation ; there is a small impression at the side below the shoulders. 



Twelve males and ten females. 



One example from Bugaba has the elytra dark green, another has them somewhat 

 purple. 



The following appear to be varieties of this species: — 



1. Niger; capite aureo; elytris cyaneis. $. 1| lin. 



Eab. Panama, David (Champion). 

 One example. 



2. Niger ; elytris vix cyanescentibus. $ . Vix 1 lin. 



Eab. Panama, David (Champion). 

 Two examples. 



3. Niger ; capite tboraceqne lsete rufo-cupreis ; elytris viridi-cyaneis. $ . 1| lin. 



Eab. Panama, Volcan de Chiriqui (Champion). 

 One example. 



y/ 4. Niger ; capite thoraceque laete rufo-cupreis, hoc discrete punctato : elytris cyaneis. c? • 1 lin. 



Eab. Panama, San Miguel in the Pearl Islands (Champion). 



This differs from all the preceding in the sculpture of the thorax being smoother, 

 with the usual shallow punctures, but with small but distinct punctures not very far 

 apart all over the surface. 



It is not improbably a distinct species. 



* The generic name is erroneously written Pachyscelus on the Plate. 



