294 . Trans. Acad. Sci. of St. Louis. 



elytra scarcely a fourth wider and two-flfths longer than the pro- 

 thorax, the humeri broadly rounding to the prothorax, feebly and 

 sparsely punctate except toward the scutellum; abdomen arcuately and 

 feebly tapering from base to apex. Male with a small, narrow, some- 

 what elongate tubercle on the median line of the fifth tergite near the 

 hind margin; sixth produced in the middle in a short and broadly, 

 evenly rounded lobe, a third as wide as the segment, the lobe very 

 feebly and broadly biirapressed; female wanting. Length 2.2 mm.; 



width 0.83 mm. New York (Catskill Mts.) lobata n. sp . 



Prothorax generally obtrapezoidal, much narrower than the base of the 

 elytra * 7 



7 — Elytra very minutely, sparsely and inconspicuously punctured as 



usual, smooth toward the inner basal angles 8 



Elytra distinctly punctured 12 



8 — Fifth antennal joint distinctly wider than long. Body rather stout, 



polished, feebly micro-reticulate throughout, the head piceous-black, 

 the antennae dusky, flavate toward base; prothorax rufo-flavate, the 

 elytra pale but less rufous, not darker at the apical angles, the abdo- 

 men flavate, with a feeble cloud on the fourth tergite, the legs pale; 

 head impressed and strongly, sparsely punctate at each side of the 

 front, the eyes small, very prominent; antennae rather short, extend- 

 ing to about basal third of the elytra, with joints five to ten stout, 

 slightly transverse, just visibly increasing in width, forming virtually 

 a subparallel club; prothorax two -thirds wider than long, slightly 

 wider than the head, the sides parallel and somewhat strongly, 

 evenly arcuate, slightly biimpressed before the middle of the base, the 

 sparse punctures as usual; elytra fully two-fifths wider and 

 about one-half longer than the prothorax, the humeri widely exposed at 

 base, rounded; abdomen nearly as wide as the elytra, gradually and 

 feebly tapering from base to apex. Male with eight elongate, sub- 

 equidistant asperities on the fifth tergite near the apex, the two 

 median rather less elongate and more acutely pointed posteriorly ; sixth 

 with two long compressed and inwardly arcuate processes at tip in 

 median two-fifths, the processes obtusely rounded at tip, oblique in 

 plane and rather carinate externally, the inclosed sinus subequally 

 trisected by two straight cylindric porrect processes which are slightly 

 bulbous at tip and abjut attaining the line of the apices of the lateral 

 processes, the surface longitudinally tumid in prolongation of each of 

 the medial processes; female unknown. Length 2.3 mm.; width 0.85 



mm. New York (Catskill Mts.) involuta n. sp. 



Fifth antennal joint at least as long as wide and generally longer 9 



9 — General form more elongate and subparallel 10 



General form stouter and more fusiform, the abdomen more rapidly and 



strongly narrowed from base to apex 11 



10 — Form moderately stout, polished, feebly micro-reticulate throughout, 



pale fiavate throughout, the head irregularly clouded with rufo- 

 piceous, the abdomen with a very faint cloud involving the fourth ter- 

 gite and the elytra more silvery; head not very transverse, sparsely 

 punctate laterally, the antennae more developed than in any other 

 species, pale flavate throughout, extending about to the middle of the 



