140 ENTOMOLOGICAL SOCIETY 



Type. No. 10444, U. S. National Museum. 



This species can only be compared with the darker specimens 

 of suffusa Casey, from which it principally differs in smaller 

 size, coarser sculpture of the elytral intervals, and longer cly- 

 peus, which covers the mandibles completely, the latter always 

 more or less visible in suffusa. 



Bitoma suffusa Casey. 



Mr. Schwarz is of the opinion that this species is synony 

 mous with gracilis Sharp. This view is very likely correct, 

 but the description is not sufficient to identify the insect with 

 certainty, and as some of the species are very close I retain 

 for the present Casey's name for this species. 



A few specimens before me, collected by Mr. Schwarz in 

 Yuma, Ariz., are slightly larger, darker in color, and in some 

 the sculpture of the intervals is coarser, but I am not able to 

 find at present a good character to separate these from the 

 lighter colored specimens. 



Phlaeonemus catenulatus Horn. 

 P. adhcerens Sharp. 



Mr. Schwarz suggested the above synonymy to me. The 

 description and excellent figure of the Guatemalan insect agree 

 so well in every respect with our species that there is no doubt 

 of the correctness of this view. A few specimens occurred at 

 Brownsville, Tex., with the typical form, with which they 

 agree in every respect except that the elytral costae are several 

 times interrupted; these may be Reitter's interruptus, which 

 is said to be 7 mm. long, while my largest specimen is 5 mm. 



Lithophorus succineus Pasc. 



I bred a few specimens of this fine species from branches of 

 Acacia ftexicaulis, and also obtained some by beating. The 

 genus Lithophorus is a member of the tribe Bothriderini and 

 differs principally from the two genera in our fauna by the 

 form of antennae; the joints 7, 8, and 9 slightly increasing in 

 width, loth much larger than the Qth, nth very small, hardly 

 visible. The species is black, nearly of the form of Bothrideres 

 geminatus, but larger and more convex; thorax uneven, with 

 a depression at middle and tuberculate at sides, the third and 

 fifth elytral intervals with interrupted costae, each costa at 

 middle with a transparent yellow spot, " like a jewel or piece 

 of amber," as Dr. Sharp so aptly describes them ; at sides 

 and apex are a number of tubercles and granulations. 



