

104 



Coleopterological Notices, III. 



pronotum in prolixus is much finer and less dense, and the elytral 

 punctures are decidedly sparser; the antennee are more slender, 

 with the joints more elongate, the comparisons being made from 

 the male ; the base of the prothorax is scarcely at all oblique toward 

 the angles, and finally, the two sexes are similar in size and form, 

 while in occidentalis the male is notably more slender than the 

 female and with a less transverse prothorax. 



The maxillary palpi are nearly as in occidentalis, but the fourth 

 joint is rather narrower. I have seen six specimens. 



Mr. Champion writes me that this species is rather closely allied 

 to durangoensis, but is distinct. 



22 H. occidentalis Champ. — Biol. Cent.-Amer., Coleopt., IV, Pt. i, 

 p. 425. — Rather elongate, parallel, moderately convex, dull and alutaceous, 

 castaneous, the legs and under surface rather paler, rufescent ; pubescence 

 short, rather fine, moderately dense, not at all conspicuous. Head finely, 

 densely punctate anteriorly, more coarsely and slightly more sparsely so 

 between the eyes, which are large, separated by one-third their width in the 

 male and one-half in the female ; antennae about two-fifths as long as the 

 body, subfiliform, moderately stout, the joints about twice as long as wide, 

 third slightly longer than the fourth. Prothorax one third (male) to one-half 

 (female) wider than long, the apex broadly, rather feebly arcuate, three- 

 fourths as wide as the base, not continuous in curvature with the sides, the 

 latter parallel and nearly straight in basal half, thence moderately convergent 

 and arcuate to the apex ; basal angles right, slightly blunt ; base posteriorly 

 oblique toward the basal angles, broadly, feebly arcuate in middle half; disk 

 scarcely impressed, rather coarsely, very densely punctate, the punctures 

 almost in contact but circular and not polygonally crowded. Elytra three and 

 one-half times as long as the prothorax and very slightly wider, gradually, 

 obtusely ogival toward apex ; sides thence parallel and nearly straight to the 

 humeri, which are obliquely, broadly rounded externally to the prothorax ; 

 disk with rather broadly, feebly impressed series of small, close-set punctures, 

 the intervals finely, confusedly and moderately closely punctured. Abdomen 

 polished, finely, sparsely punctured, a little more closely so along the middle 

 in the male. Legs decidedly robust, the basal joint of the hind tarsi much 

 longer than the remainder. Length 10.0-11.0 mm. ; width 3.3-3.8 mm. 



Texas. 



The fourth joint of the maxillary palpi is strongly dilated, with 

 the apex much longer than either side, and, in outline, is nearly as 

 in Lobopoda. 



The large size and elongate-parallel form will readily serve to 

 differentiate this species from any other within our faunal limits, 

 being approached in these respects only by prolixus. 



