150 GEO. H. HORN, M. D. 



actly the same, the present one is more opaque and transversely more 

 convex. Several immature specimens are ferruginous. 



Collected at Camp Grant, Arizona, under fallen Opuntia. 



The species of Hyporhagus are separated by apparently feeble, 

 though very constant characters. The two species above cited, while 

 differing greatly to the eye, are very difficult to describe as distinct. 

 From an examination of our species (Lecontei, Thorns., being unknown 

 in nature) the following remarks have been prepared to still further 

 assist in their identification. 



Body very shining. 



Anterior tarsi % three joints dilated and pubescent piiiictulatiis. 



********* (Lecoutei.) 



Body feebly shining, sub-opaque. 



Three joints of anterior tarsi % dilated and pubescent. 



Sides of thorax slightly arcuate. Surface sub-opaque. Strise composed of 

 moderately coarse punctures, the inner rows coarser and more distinct 

 than the outer. Epipleurse black, smooth, unistriate; inflexed portion 

 of elytra rufous, finely rugulose within and opposite the hind coxse not 



wider than twice the epipleurse opacultis. 



Two joints of anterior tarsi % dilated and pubesent. 

 Elytral rows composed of moderately coarse punctures, intervals with 

 nearly obsolete punctulations. Surface sub-opaque. Epipleurse opposite 



hind coxae as wide as inflexed portion of elytra 0|mntiiC. 



Elytral rows composed of fine punctures, the inner two and scutellar row 

 nearly obsolete or not distinguishable from the punctulations; intervals 

 distinctly but finely punctulate, evenly over the entire surface, which is 

 feebly shining. Epipleurse opposite the hind coxse slightly narrower 



than the inflexed portion of elytra gilcnsis. 



II Lecontei, Thorns., is unknown to me. It resembles punctulatus 

 in form and in having the sides of thorax arcuate. It differs in hav- 

 ing the thorax more feebly punctured and the elytral rows of punc- 

 tures more distinctly impressed. It is said to be from California, but, 

 judging from the form of the three species that have occurred in the 

 western fauna, the locality seems doubtful. 



SPHAIiMA, n. g. (Pythidse). 

 Mentum quadrate, slightly broader than long, ligula scarcely visi- 

 ble, rounded in front. Last joint of maxillary palpi oval, truncate at 

 tip. Mandibles concealed beneath the labrum, arcuate and bifid at tip. 

 Labrum transverse, feebly emarginate. Head broad, cylindrical be- 

 hind the eyes, epistoma broadly rounded, feebly truncate at middle. 

 Antennae as long as head and thorax and slightly thicker toward the 

 tip ; joint 1 moderate, 2 — 5 obconical, joint 2 shorter, and 3 longer 

 than the others, 6 — 10 oval, broader than the preceding joints; joint 



