146 SEREICOBJNIA. 



six nearly equal short broad truncate teeth, with an indication of a small one on the 

 outer side (fig. 11) ; one example, which appears to have the teeth much worn, does not 

 show these small teeth. 



20. Pachyschelus granulosicollis. (Tab. VII. fig. 20.) 



Oblongus, depressus, post medium oblique attenuates, subtus niger; capite viridi-aeneo, nitido, vertice confertim 

 subtiliter granuloso ; thorace brevissimo, lato, viridi-aureo, omnino confertim subtiliter granuloso, surdo, 

 punctis minutis interspersis ; scutello lato, obscure seneo, polito ; elytris rufo-cupreis (dorso fuscescente), 

 punctatis. 5 . 



Long. 1| lin. 



Hab. Guatemala, San Geronimo (Champion). 



This is a somewhat short and broad species. The elytra at the base are not wider 

 than the base of the thorax, but are gradually widened to a little behind the middle 

 and then obliquely narrowed to the apex; the surface has a somewhat wrinkled 

 appearance, and there are three or four lines of punctures in the basal half; the 

 lateral impression is strongly marked. 



21. Pachyschelus deplanatus. (Tab. VIII. fig. 12.) 



Lius deplanatus, Chevr. in Silbermann's Rev. Ent. v. p. 104 \ 

 Hab. Mexico, Orizaba 1 . 



The type-specimen of this insect, now in the British Museum, is a female. It is an 

 elongate oblong-ovate depressed species, very unlike any but the following. A specimen 

 from M. Salle's collection measures 2 lines, but does not otherwise differ from the type. 



Three specimens from San Geronimo may be referred to this species, but they appear 

 to have the elytra a trifle shorter. The terminal segment of the abdomen in the male 

 is not much produced at the apex, the produced part slightly arcuate, with eight teeth ; 

 the outer tooth at each end of the series is acute, and has its apex directed outwards, 

 the six others are broad and almost truncate (fig. 12). 



22. Pachyschelus aversus. (Tab. VIII. fig. 13.) 



Late ovatus, depressiusculus, nitidus, supra purpureo-cyaneus ; elytris sat fortiter punctatis. 

 Long, ly 9 ^ lin. 



Bab. Mexico, Cordova (Salle). 



This is very like the preceding, but is distinctly shorter and broader, with the elytra 

 relatively shorter and more rapidly narrowed to the apex. The head and thorax are 

 blackish-blue; the elytra dark purple-blue. The thorax has some small punctures 

 scattered over the sides. The terminal segment of the abdomen of the male is injured 

 in the specimen before me, but appears to have had ten teeth : the outermost tooth is 

 very short and conical, directed outwards, the next one very small and acute ; the next is 

 much larger, conical, very acuminate at its apex, directed outwards ; the next is a little 



