294 COLEOPTERA OF NORTH AMERICA. 



A very peculiar tribe, recalling Ibidiou by its slender, cylin- 

 drical form, but not related to it nor to any other known to us. 



But one si)ecies Ancylocera rugicollis, black with scarlet elytra 

 and abdomen, is found in our Southern States from North Caro- 

 lina to Texas. 



Tribe VII.— PAUISTEMIIIVI. 



We have adopted the name of this tribe from Lacordaire; it has 

 two representatives in our fauna ; four species of PteroplaLus 

 from Florida, Texas, New Mexico, and Arizona, and Holopleura, 

 found in California. 



The head is moderate, mandibles small, acute, curved ; the eyes 

 large, very deeply emarginate, not very finely granulated, and 

 embracing the base of the antennae rather less than usual, the 

 upper lobe is larger than usual ; the front is rather flat, with 

 the transverse suture very deep; tlie palpi short, with the last 

 joint cylindrical, truncate at tip; the mentuni is trapezoidal, and 

 more porrect than in neighboring groups, being almost as in 

 Caliidium; the antenui£ (?) are a little more than half as long as 

 the body, stout, serrate, and velvety; the 1st joint is as long as 

 the od, but stouter, the 2d is one-third the size of the 3d, tiic 4th 

 shorter than the 6th, which is the longest, the following diminish 

 in length. The prothorax is rounded on the sides, truncate in 

 fronts bisinuate at base; scutellum variable in form; elytra a little 

 wider from the base, rounded at tip, with the suture, margin, and 

 three discoidal costse elevated, the intermediate costa being the 

 longest; epipleurse well marked, extending to the tip. Pro- 

 sternum narrow between the cox», which are rounded, with the 

 cavities open behind, and feebly angulated externally; meso- 

 sternum flat, triangular, coxal cavities widely open externally; 

 epimera of metathorax moderately wide, parallel. Ventral seg- 

 ments nearly equal. Legs short, slender, thighs not clavate, 

 tibial spurs very small, 1st joint of hind tarsi as long as the two 

 following. The stridulating plate is very finely striate, large 

 and undivided, with a row of punctures each side. On each side 

 of the pronotum there is an elliptical depressed space, tolerably 

 well defined by an acute edge. 



This like the following tribe is a transition form; the 2d joint 

 of the antenuiB is too large for the series in which we have ])laced 

 it, but, on the other hand, the front coxae are not transverse as iu 



