12 FREDERICK BLANCH ARD. 



luetastei-num and abdomen ; prosternal process margined behind the coxie, 

 side pieces strongly sinuate at base inside of the angles, submarginal line 

 visible from above at base, cariniform, feebly descending and more or less im- 

 pressed, reaching to the middle or to the anterior third. Hind coxal plates with 

 posterior margins transverse. Legs slender, black or varied with rnfous; tarsi 

 slender, the first joint of the middle and hind tarsi longer than the last, the 

 second equal to the last. Length .23.30 inch ; 6-7.5 mm. 



C'aliforiiia, Nevada, Washington Territory. 



In appearance resembles immaculate specimens of fenestratus, but 

 the sides of the prothorax are not rounded behind, the hind angles 

 are not truncate above and the hind coxal plates are less dihited. 

 The sides of the prothorax beneath are sometimes more coarsely or 

 variolate punctate behind. 



10. <'. luridipes Cand. — Opaque, dull l)lack, with cinereous or fuscous pu- 

 bescence and suberect bristles. Antennse black, serrate, about as long as the 

 head and thorax in the %, a little shorter and more slender in the 9- Head 

 densely, finely punctate and with sparser coarser punctures, front broadly 

 rounded, with raised margin, the lateral oblique carina long and strong. Thorax 

 broader than long in the 9 ; sides strongly rounded and narrowed in front, ob- 

 liquely much less narrowed behind, convex, disc feebly or not at all channeled, 

 densely finely punctured with the coarser punctures distinct, or not; base im- 

 l)ressed each side, lobe variable, distinctly tridentate or merely bisinuate, plica:' 

 moderately long, well marked, carina joining the submarginal behind. Elytra 

 a little wider than the thorax, feebly convex or subdepressed, sides broadly 

 rounded or subparallel and narrowed from behind the middle, strise not much 

 impressed, with more or less elongate punctures, intervals flat, moderately puuc- 

 tulate and frequently finely transversely wrinkled. Body beneath more shining, 

 submarginal line of prothorax cariniform, slightly visible at base from above, 

 nearly straight and reaching to the middle or beyond, sides rather densely punc- 

 tulate at front and middle with coarser punctures more or less evident, coarsely 

 variolate punctate behind, prosteruum rather less closely punctulate, with the 

 coarser punctures regularly dispersed, posterior process long, arcuately, or usually 

 feebly ascending, not margined behind, metasternum and abdomen with rather 

 close, double punctuation, the last segment more coarsely and densely punctate 

 at tip, hind cox?e transverse behind. Legs usually with the thighs dark and the 

 tibite and tarsi pale, sometimes the tibiae and tarsi are more or less iufuscated or 

 the color may be entirely yellow, tarsi slender, the first joint of the anterior ones 

 equaling the last, in the middle and hind tarsi much longer than the last, which 

 is scarcely longer than the second. Length .25 inch ; 6-7 mm. 



Ten specimens, California. iStructurally, very similar to tumicli- 

 collk, but differs by the prosternal process not margined behind, by 

 the coarser and denser punctuation, the usually ])aler legs, the erect 

 bristles, which are usually only feebly evident in that species, and 

 the form rather more elongate. Like that species, also, the hind 

 margin of the prosternum beneath is distinctly sinuate inside the 

 angles. 



