IGO GEO. H. HORN, M. D. 



This species is very abundant in western and south-western Texas, 

 whence specimens are sent in every collection made. It resembles 

 closely several Mexican species, though readily distinguished by its 

 less convex form, and the fewer number and less elevation of the black 

 tubercles. 



Z. concolor, black, moclerately shining: liead sparsely punctured: thorax 

 moderately convex, sparselj' punctured, sides anteriorly rounded, posteriorly 

 erenulate, base subtruncate, much narrower than at apex ; elytra elliptical, 

 sides moderately rounded, base slightly emarginate, humeral angles distinct, 

 surface deeply wrinkled, forming very convex tubercles, with a tendency to a 

 longitudinal arrangement; apex of elytra forming two tubercles, separated 

 from the sutural elevation by a deep groove. Beneath black, coarsely and 

 densely punctured. Length .6 inch. 



Leconte, Ann. Lye. V, 130. 



Found near Santa Fe, New Mexico, by Mr. Fendler. This species 

 is at present rare in collections, the type being the only one at present 

 known. Cabinet of Dr. Leconte. 



Z. guttulatus, l)lack, subopaque; head very sparsely punctured ; thorax sparse- 

 ly punctured, moderately convex, anteriorly emarginate, posterior margin sub- 

 truncate; elytra oval, convex; sides rounded, apex bituberculate, tubercles at- 

 taining the sutural elevation, groove distinct, surface suboj^aque, with smooth, 

 elevated spots arranged in eight or more longitudinal rows; spots more or less 

 rounded, distinct from each other. Beneath subo])aque, sparsely though rather 

 coarsely punctured. Long .64 — .77 inch. 



This pretty species occurs in south-western Texas, whence two speci- 

 mens were brought by Mr. E. T. Cresson, and are now in the Collec- 

 tion of the American Entomological Society. This may be distin- 

 guished very readily from all our other species by the peculiar, almost 

 sericeous, appearance of the surface above and below, and by the form 

 and arrangement of the smoother elevated spots. These arc more dis- 

 tinct than in tristis and more distantly placed, at the same time pre- 

 serving a nearly rounded form ; they are less convex than in concolor 

 and not nearly so glossy. The interspaces are distinct, and deep opaque- 

 black in color. On comparison with trutis, and which it would be the 

 more readily confounded by descriptions, the thorax will be found 

 much less convex, the sides more distinctly angulate, and with compa- 

 ratively few punctures on the upper surface. The elytra are more 

 rounded on the sides and more convex above. The apical groove is 

 also much shorter. In outline the elytra more nearly resemble those 

 of concolor. From concolor this species may be distinguished by the 

 peculiar appearance of its surface, and by the less convex, less shining- 

 elevated spots, and by the distance at which they are placed from each 

 other. 



