AMERICAN COMPONENTS OF THE TENTYRIIN^ 463 • 



terior wall of the abdominal excavation very deeply and narrowly 

 emarginate at the middle. Length 23.0-26.0 mm. ; width 8.5- 

 lo.o mm. Texas. [= nodulostis Horn nee Sol., and variolosus 

 Hald.] haldemani Horn [Salle MS.]. 



The series of eight specimens in my cabinet hold together 

 remarkably well and with very little variation ; the species is , a 

 related more especially to reticulatus and niarnioratus. The ^ C^u^ 

 authorship of the name of this species is rather uncertain ; Horn , ^^oV patfc 

 wished Salle to be credited, but the few comparative remarks 

 made by him form the basis of a decision by Mr. Champion 

 (Mem. Ill, Soc. Ent. Belg.), that he himself is the proper 

 authority for the name. The description given above is the first 

 that has been published so far as known to me. 



The integuments in this genus are so thick and hard as to 

 almost defy ordinary methods of mounting, and I have fre- 

 quently had the point of an ordinary pin curl upward in attempt- 

 ing to force it into the elytron, finally being compelled to bore 

 a hole with a steel instrument for the insertion of the pin. 



Zopherodes Csy. 



The geographic range of this genus is from northern Mexico 

 to Utah and westward to the southeastern mountains of Cali- 

 fornia, also occurring in Lower California, but it does not 

 appear to extend to the Pacific Ocean, having its maximum 

 development in Arizona, New Mexico and adjacent regions. 

 The species are much smaller in size than in Zopherus, very 

 numerous and conform to a nearly uniform type of structure 

 and facies, so that they form fully as difficult a study as the pre- 

 ceding genus. The surface sculpture is much finer and closer 

 than in Zopherus^ and the body is uniformly black throughout in 

 all except the elegans^ of Horn, which presumably does not be- 

 long here and which I have been unable to observe in nature. 

 In the species of the tristis type, the upper surface is coated, 

 especially toward the sides, with a pale grayish indument, which 

 is minutely sculptured and apparently a normal part of the 

 integument, but this indument is not observable to any consider- 

 able extent elsewhere. The components of this genus having 

 been recently reviewed (1. c, p. 38), I will simply add here a 



