July, '07] ENTOMOLOGICAL NEWS. 305 



9. Head in front with two arcuate impressions, which are sometimes 

 connected ; thorax punctate at sides ; elytra with inner stria 

 entire, outer short, basal ; supra-orbital stria short, basal. 



viuina Lee. 



10. Elytra with outer stria entire, inner short basal ; prosternum feebly 



convex, broadly arcuate in front lucida Lee. 



Elytra without entire striae ; prosternum flat, broad and truncate at 

 apex ii. 



11. The two striae on each elytron, short, basal, the inner without apical 



appendage fossularis Say. 



The inner elytral stria with apical appendage, the outer short, basal. 



populnea Lee. 



Hololepta ncglecta Blaisd., described in Zoe, Vol III, p. 338, 

 is unknown to me and not included in the above table, as 

 nothing tangible could be found in the poor description to 

 differentiate this from the allied species. 



Omalodes grossus Mars, (texanits Mars , lubricans Casey.) 



The principal difference between grossus and lubricans con- 

 sists in the punctuation of the pygidium and propygidium, 

 which are in grossus coarsely punctuate at sides only, while 

 in lubricans the entire pygidium is coarsely punctuate, except 

 in anterior third and the punctured space on each side of the 

 propygidium connected at apex by some very fine punctures. 

 The five specimens before me show all grades of variation in 

 the punctuation of the two pygidia from grossus (Huachua 

 Mountains, Arizona) to lubricans (Sta. Rita and Huachuca 

 Mountains, Arizona). 



Omalodes texauus Mars. 



Is principally separated from grossus by having the two 

 punctured areas at sides of the two pygidia connected at 

 apex and the hind tibiae tridendate. The first character, as 

 shown above, is not constant, and an examination of the ten 

 hind tibiae of the five specimens before me reveals the in- 

 teresting fact that the number of teeth is not alone variable, 

 but that even in the same specimen one of the hind tibia 

 may be tridentate and the other quadridentate, also that the 

 distance between the first and second and second and third 

 tooth varies greatly on the two tibiae of the same specimen 

 In my opinion there is very little doubt that tc.ranus also has 



