228 MEMOIRS ON THE COLEOPTERA 



the most casual observation to render evident the radical incon- 

 gruity between these species and Mallodon dasystoma. Even 

 should my interpretation of Aplagiognathus, through guatemalensis , 

 prove incorrect, it is not possible that Mallodon melanopus can 

 be generically associated with Aplagiognathus hybostoma, and so, 

 in any event, the genus Paramallus is necessary and valid. Mela- 

 nopus inhabits the southern Atlantic regions, while cilipes Say, 

 is confined to Texas and neighboring parts, and the two are by 

 no means specifically the same, cilipes being narrower in build, 

 with shorter prothorax, much denser internal tibial fringes and 

 more slender antennae. In the female of melanopus the prothorax 

 is much shorter and more transverse, the antennas notably shorter 

 and the metasternal median line much less deeply grooved than 

 in the male; the fifth ventral is almost similarly sinuato-truncate 

 medially at apex in both sexes, but is relatively wider in the female 

 and almost without any of the dense pale reddish terminal fringes 

 of the male; in the male of cilipes the metasternal groove is deeper 

 than in the male of melanopus. 



Serrulatus Lee., also belongs to this genus and the following is 

 allied to serrulatus, being more elongate and rather less convex 

 than melanopus or cilipes. These four are the only species now 

 known to me as properly assignable to Paramallus. 



Paramallus arizonicus n. sp. Female very elongate, nearly parallel, 

 convex, shining, moderately pale red-brown in color throughout; head 

 extremely coarsely, confluently punctato-rugose, more sparsely toward 

 base and more finely and confluently behind the eyes, the front furrowed, 

 the furrow becoming a deep stria behind the line of the eyes; mandibles 

 short, thick, arcuate, nude and densely punctate internally, sparsely and 

 more coarsely on the outer surface, the inner margin with a small sub- 

 basal tooth and a short broad projection beyond the middle, sinuate at 

 its apex; gense broadly but sharply angulate; antennae not quite extending 

 to basal fourth of the elytra, rather thick, not tapering distally ; prothorax 

 rather more than twice as wide as long, the sides rounding, even and 

 scarcely at all reflexed from base anteriorly to the acute tooth at basal 

 fourth, thence very feebly converging and slightly arcuate, with numerous 

 small and finely aciculate, spiniform teeth to the apex; surface but slightly 

 undulated, smooth, polished and finely, sparsely punctate, wholly irn- 

 punctate broadly along the middle, the sides steeply but not abruptly 

 declivous in lateral fifth, the lower part of the slope coarsely and confus- 

 edly punctato-rugose, the upper sparsely and irregularly punctate, with 

 a more coarsely sculptured line feebly evident near the summit; elytra 

 about two and one-half times as long as wide, slightly widest at the middle, 



