246 MEMOIRS ON THE COLEOPTERA 



foveae broadly impressed and closely punctate; elytra barely one-half 

 longer than wide, parallel, with rather more arcuate sides than usual, 

 not quite one-half wider than the prothorax, the striae rather deeply 

 impressed; intervals convex; dorsal puncture at three-fifths; tarsi 

 nearly as in antennalis, the anterior (cf ) rather less dilated but with 

 similar large oblique scale-like hyaline plates, acucely pointed at their 

 apices. Length (cf) 3.7mm.; width 1.2 mm. New York (near the 

 City), Jiilich insulsus n. sp. 



Elytra never having a trace of scutellar stria, as is the case also in all the 

 subsequent species 7 



7 General color more testaceous, the pronotum always clear rufous 

 throughout 8 



General color more blackish, the pronotum always largely dark or mottled 

 with blackish 9 



8 Body larger, testaceous, shining, the head but little darker; elytra 

 parallel, broadly clouded with blackish, with the suture paler; under 

 surface of the hind body piceous-black; head nearly as insulsus, the 

 antennae more slender and less broadly compressed, similar in color; 

 prothorax fully a fourth wider than long, the sides rather strongly 

 rounded, unusually converging basally to the minutely prominent 

 angles; base distinctly narrower than the truncate apex; surface nearly 

 as in the preceding, except that the median stria is finer and does 

 not attain the apex as a rule; elytra longer, almost three-fifths longer 

 than wide, parallel, with feebly arcuate sides and evenly rounded 

 apex, the striae impressed, with rather convex intervals, except apic- 

 ally, where the striae are more superficial and the intervals flat; 

 discal puncture near apical third; basal joint of the hind tarsi much 

 shorter than the next two, the fifth nearly as long as the preceding 

 three; sexual characters as in the. preceding. Length (cf 9 ) 3.4-4.5 

 mm.; width 1.2-1.4 mm - Long Island and North Carolina to 

 Missouri. [Trechns rupestris Say; T. flavipes Kirby; Acupalpus 

 elongatulus Dej.] rupestris Say 



Body much smaller and less elongate, the head nearly black; elytra black 

 in about apical half, with the usual pale suture; under surface of the 

 hind body black, the epipleura and legs very pale; head nearly three- 

 fourths as wide as the prothorax, with moderate though very promi- 

 nent eyes; antennae dark, paler basally; prothorax nearly a third 

 wider than long, the sides more strongly rounded anteriorly than in 

 rupestris and becoming rather more sinuate at base, the minutely 

 prominent angles rather more acute and distinct; surface nearly 

 similar, except that the stria is generally entire and the foveae smaller, 

 more punctiform and with still smaller area of punctuation, the 

 punctures fine; elytra scarcely one-half longer than wide, of the usual 

 form, fully one-half wider than the prothorax, the striae more im- 

 pressed suturally, the intervals there convex but flatter externally and 

 at apex; discal puncture strong, at apical third ; hind tarsi very slender, 

 two-thirds as long as the tibiae. Length (9) 2.9-3.4 mm., width 

 1.0-1.2 mm. New York (Lake Champlain and Catskill Mts.), also 

 in Indiana. Five examples occultus n. sp. 



9 Form elongate, moderately convex, blackish-piceous, the head, pro- 



