480 Coleopterological Notices^ VI. 



base broadly arcuate; marginal fringe very short ; disk rather finely, sparsely 

 punct<ite, coarsely scabious toward the sides. Elytra l)arely three-fifths longer 

 than Avide and just visi1)ly wider than the i)rothorax, parallel and straight at 

 the sides, the apex subcircularly rounded; sutural angles rounded; humeri 

 tumid; ])unctures rather fine and close-set, suljrugose, the inters])aces polished. 

 Abdomen coarsely pubescent, minutely })ut not very densely punctulate, the 

 legs long. Length 3.8 mm.; width 1.5 mm. 



California. 



Tills verv distinct species is represented by a single male, hav- 

 ing feeble sexnal modifications at the abdominal vertex, the fifth 

 segment being truncate an"d apparently ver^- feebly- sinuate to- 

 ward the middle, with the surface unmodified; the genital seg- 

 ment is impressed along the middle as usual. 



10. T. traii§vei'!^us n. sp. — Oblong, moderately convex, shining, black, 

 the upper surface Avith very feeble subitneous lustre; legs l)lack, the tibiiv and 

 tarsi ])iceous; antenna- piceous, the basal joint black; pubescence sparse but 

 rather long, somewliat coarse, cinereous and distinct; marginal fringe short on 

 the prothorax, much longer on the elytra. Head fully three-fourths as wide 

 as the prothorax, finely, sparsely but subasperately punctate, rugose toward 

 base, the frontal impressions strong and separated by a sensibly elevated im- 

 punctate area; epistoma pale and coriaceous; labrum transversely arcuate at 

 apex; eyes rather large and prominent; antenna; not very stout, one-half lon- 

 ger than the prothorax, the fifth joint but feebly dilated, tenth strongly trans- 

 verse. Prothorax Aery short and transverse, nearly twice as wide as long, 

 the sides parallel, e\'enly and somcAvhat feebly arcuate from l)ase to apex, the 

 latter evenly and feebly arcuato-truncate throughout the Avidth, the base 

 scarcely visibly more arcuate; Ijasal and apical angles almost equal, 

 slightly obtuse and rounded but distinct; disk rather finely, s|)arsely 

 perforato-punctate, the edges of the punctures elcA-ated or burred, broadly 

 scabrous toAvard the sides. Elytra three-fifths longer than wide, about equal 

 in Avidth to the jirothorax, parallel and straight at the sides; apex broadly 

 rounded; humeri tumid; flanks impressed toward base; punctures rather fine 

 and moderately close-set, subrugose, the interspaces polished. Abdomen 

 somewhat finely and thinly pubescent, the punctures very tine and feeble. 

 Length 3.25 mm. ; Avidth 1.3.^ mm. 



California (San Francisco). 



The mule has the fifth ventral unmodified on the disk, the apex 

 truncate and apparentl}^ verj slightly sinuate toward the middle, 

 the genital segment broadly impressed, finely canaliculate along 

 the middle and broadly- emarginate at apex. This species is allied 

 to several of the cylindricus group, but is distinguishable at once 

 from any of them by the ver^' short prothorax, and, from fra- 



