PACHYSCHELUS. 141 



6. Pachyschelus Mgens. (Tab. VII. fig. 17.) 



Ovatus, nitidus, subtus niger ; capite thoraceque aureis viridi-tinctis ; elytris rufo-cupreis. S . 

 Long. 1| Hn. 



Hah. Guatemala, Coban in Vera Paz (Conradt). 



This is less convex and less regularly oval than the preceding species, being more 

 rounded in front and more narrowed posteriorly. The head and thorax are brassy, 

 appearing very slightly green in some lights. The head is distinctly but not closely 

 punctured. The thorax has distinct punctures scattered over the surface, and under a 

 high magnifying-power a few smaller punctures are visible (under the microscope the 

 whole surface is seen to be densely and extremely finely punctured) ; the sides at the 

 middle are slightly rugose close to the margin. The elytra at the base are not broader 

 than the base of the thorax ; they are a trifle wider below the shoulders, and are then 

 arcuately narrowed to the apex ; reddish-coppery, verging into brassy at the apex ; 

 finely and irregularly punctured, with some more distinct punctures in the basal half; 

 the lateral impression is rather large and somewhat triangular. The terminal segment 

 of the abdomen is slightly narrowed at the apex, with four equal acute teeth on each 

 side (placed slightly obliquely), the two sets of teeth separated by a wide space, the 

 margin here being rectilinear (fig. 17). 



7. Pachyschelus communis. (Tab. VIII. fig. 3.) 



Ovatus, post medium attenuatus, nitidus, subtus niger ; capite viridi-aureo ; thorace medio nigro, lateribus aureis 



viridi-tinctis, rugosis ; scutello nigro ; elytris cyaneis, sat fortiter punctatis, ad apicem lsevioribus. tf $ . 

 Long. 1| lin. 



Hah. Panama, Taboga I. (Champion). 



The head is finely and distinctly, but not closely punctured. The thorax is smooth 

 on the disc, with very distinct punctures scattered over the surface and smaller punctures 

 interspersed between these ; the sides are golden, this colour extending from the margin 

 to a line drawn from the posterior angle to the inner margin of the eye ; this golden 

 part is rugose. The elytra are dark blue, verging into green, somewhat strongly punc- 

 tured, but smoother at the apex, rather long, as broad at the base as the base of the 

 thorax, subparallel to the middle of their length, and then obliquely narrowed to the 

 apex (or even very slightly sinuate behind the middle), the sides being very obtusely 

 but distinctly angular at the middle ; the lateral impression is moderately large. The 

 apical segment of the abdomen of the male has three nearly equal acute teeth on each 

 side (placed obliquely) ; the two sets of teeth separated by a rather wide space (fig. 3). 



8. Pachyschelus familiaris. (Tab. VIII. fig. 9.) 



Ovatus, post medium angustatus, nitidus ; capite antice viridi-aurato ; thorace fere nigro, lateribus anguste 



viridi-auratis- ; scutello nigro j elytris purpureis vel violaceis, punctatis. <$ $ . 

 Long, lj Hn. 



