3i 6 MEMOIRS ON THE COLEOPTERA 



sharply defined; scutellum rather smaller, similarly acutely trian- 

 gular but having far fewer punctures, these principally aggregated 

 in a cluster at each side basally, the hairs borne by the punctures 

 finer; elytra with the ridges even feebler, smooth, the punctures of 

 the intervals confused, smaller and sparser than in histrionica and 

 narrowly elliptic-annular, open behind as usual, toward the sides 

 coarser and deeper and in the form of short transverse crescents; 

 pygidium (9) with very even and barely at all convex surface, 

 covered throughout with dense yellowish tomentum, except the 

 extreme ends, the incised lines of the tomentum sparse, bilaterally 

 oblique in general direction, the erect hairs rather long but fine. 

 Length ( 9 ) 10.8-1 i.o mm.; width 5.8-6.0 mm. Arizona (southern), 

 Levette scabiosa n. sp. 



The antennal club in this group differs sexually far less in length 

 than in any of the preceding groups and is rather small in both 

 sexes, but subtomentosa, which I have not seen, was placed in 

 Erirhipis by Burmeister. However, the validity of the group as a 

 subgenus depends more upon the disposition of the anterior tibial 

 teeth, non-sinuate clypeus, feeble basal sinus of the pronotum, 

 tomentose elytra and some other characters, in the aggregate 

 constituting an isolated habitus, than it does upon any single 

 organic modification. It is probable that the species described 

 above under the name histrionica is the slight varietal form called 

 sonorce by Bates; I judge so, at least, by the numerous scutellar 

 punctures and the geographic habitat. Scabiosa cannot be con- 

 sidered closely allied, as it is very much narrower and more elongate 

 even in the female. 



Group V. 

 Subgenus Rhipiphoria nov. 



The general scheme of ornamentation is one of the more useful 

 discriminating features of this group, the pronotum being vittate 

 and the elytra with sharply denned solid black vittae in the typical 

 species, and with the comminuted spots in certain other types, 

 such as arizonica, tending strongly to linear arrangement. The 

 antennal club differs as much sexually here as in any other group 

 of the Erirhipid series, being very much longer in the male than 

 in the female. The upper tooth of the anterior tibiae becomes very 

 feeble here, even in the female, and is generally wholly obsolete 

 in the male. The clypeus is broad, with the edges much thickened, 

 the apex feebly reflexed and usually with a distinct rounded sinus 

 medially deep in geminata. The species at hand are as follows: 



