278 LAMELLICORNIA. 



marginibus elytrorumque sutura flavescentibus, subtus submetallico-viridis plus minusve rufo-micans, 

 tarsis igneo-aureis ; capite et tborace conspicue sed discrete punctatis, interstitiis subtilissime et dense 

 vix impresse punctulatis, hoc medio angulatim dilatato crasse marginato sulco marginali profundo, 

 angulis anticis acutis, posticis reetis ; elytris subtiliter punctulato-striatis, interstitiis subtilissime dense 

 vix impresse punctulatis, stria marginali lata punctata ; pygidio subtilissime striguloso. Mesosterni 

 processus brevius quam in P. victorina, conicus. 

 Long. 28-33 millim. 



Hab. Nicaragua, Chontales (Belt) ; Panama, Bugaba, Volcan de Chiriqui 4000 to 

 6000 feet (Champion). 



Eighteen examples, offering no differences in colour. The usual secondary sexual 

 characters in clypeus, anterior claws, and pygidium seem to be very slight in this 

 species, though small differences in the outline of the clypeus show that we have both 

 sexes. In all examples the pygidium is convex near the apex, and more or less 

 culminate along the middle. 



One of our examples bears a label in M. Boucard's handwriting " Plusiotis aurora, 

 var., Boucard." This species, therefore, is that which he describes (Proc. Zool. Soc. 

 1875, p. 119) as a doubtful green variety of his P. aurora. The specimen figured is 

 from the Volcan de Chiriqui. 



4. Plusiotis marginata. (Tab. XVI. fig. 11.) 



Plusiotis marginatus, Waterhouse, Ent. Monthly Mag. viii. p. 5 \ 



Hab. Panama, Chiriqui 1 (Trotsch), Volcan de Chiriqui 2500 to 6000 feet (Champion). 



The pygidium is strongly convex near the apex in both sexes. The males are distin- 

 guishable by the larger claw of the anterior tarsi being much longer and broader than 

 in the females. 



5. Plusiotis resplendens. 



Plusiotis resplendens, Boucard, Proc. Zool. Soc. 1875, p. 119, t. 23. fig. 5 l . 



Hab. Costa Rica ( Van Patten, Rogers), near San Jose (Boucard x ) ; Panama, Volcan 

 de Chiriqui 4000 to 6000 feet (Champion). 



Twenty-five examples. In this pale golden, very highly polished, almost silvery 

 species the clypeus is a little narrowed near the apex in both sexes, and the apical 

 margin reflexed and often distinctly sinuated. It is remarkable for the form of the 

 mandibles, which show a tendency to reversion to the Pelidnota type, for their outer 

 edge is not broadly rounded, but more or less sinuated, and in some examples very 

 obtusely bidentate. The pygidium is clothed with long, stiff, tawny hairs on its posterior 

 half; it is slightly more convex in the male than in the female, but has not the convex 

 protuberance near the tip, which is so pronounced in P. aurora, var. chrysopedila* and 

 P. marginata. The larger anterior claw of the male is much longer and broader than 

 in the female. The size ranges from 22 to 27 millim. 



