CALIFORNIA ACADEMY OF SCIENCES. 31 



separated hy more than their own widths and setigerous. Abdomen rather 

 robust, nearly as wide as the elytra; border moderate; surface very minutely, 

 feebly, denseh' and sub-asperately punctate, the asperities being arranged in 

 very close, interrupted, tran&verse wavy lines. Legs moderate; anterior tarsi 

 distinctly dilated, fourth joint slightly emargiuate, first four joints of the 

 posterior tarsi decreasing uniformly and very gradually in length, the first 

 less than one-half longer than the second and much shorter than the fifth, 

 fourth longer than wide. Length 3.8 mm. 



Santa Clara Co., 1 6 , 



The fifth ventral segment is thickened in the middle third 

 at apex, the edge being obliquely beveled and having a 

 dense comb -like row of very minute, parallel, longitudinal 

 black ridges or strigse; sixth segment broadly and very 

 strongly emarginate at apex, tlie emargination acutely 

 rounded anteriorly and having at each side, slightly distant 

 from the edge of the notch and at about the middle of its 

 length, a small brush of very long densely-placed hairs; 

 seventh segment very narrowly divided, truncate at tip, 

 large and prominent. 



25 — M. quadricollis n- sp. — Form rather robust; head piceous-black;prouo- 

 tum and elytra pale rufo-testaceous, the latter slightly the paler; abdomen 

 pale brownish-fuscous; legs, antenna;, labrum and palpi concolorous, very 

 pale flavate; pubescence sparse anteriorly, coarser, much denser and not 

 very conspicuous on the elytra and abdomen, distinctly denser on the latter; 

 integuments alutaceous. Head moderate, as wide as long; sides short, par- 

 allel; base truncate, angles rather broadly rounded and slightlj' prominent; 

 surface moderately and evenly convex, extremely minutely and densely 

 punctate, with a very narrow median line which is totallj^ obliterated ante- 

 riorly; antennas rather robust, as long as the head and prothorax together, 

 second joint three-fourths as long as the third. Prothorax nearly quadrate; 

 sides parallel and feebly arcuate; base broadly and rather feebly arcuate; 

 apex broadly arcuate, very feebly and roundly emarginate in the middle 

 third, with the edge at each side just without the emargination slightly sinu- 

 ate; apical angles very narrowly rounded, basal broadly so; disk distinctly 

 longer than the head, exclusive o^ the labrum, and very slightly wider, 

 broadly and rather feebly convex, excessively minutely and densely punc- 

 tate; punctures noticeably sparser toward the middle, where there is a very 

 narrow imperfect impunctate line, and, near the base, a short median stria. 

 Elytra very slightly wider than the pro no turn; sides parallel and slightly 

 arcuate; together broadly and extremely feebly sinuate at apex; disk slightly 

 longer than wide, scarcely one-fourth longer than the pronotum, very mi- 



