30 CALIFORNIA ACADEMY OF SCIEXCES. 



decidedly from anything hitherto described; the head is 

 sinalL trianguhir, with very large, coarsely granulated eyes, 

 robust antenme and with an entirely different structure of 

 the labruni. The species are rather robust, and the integu- 

 ments throughout are strongly alutaeeous, this appearance 

 being produced upon some portions of the body by an ex- 

 cessively minute and dense punctuation, ;ind upon others by 

 a correspondingly minute and dense granulation. The head 

 in both of the forms here described is blackish, the remain- 

 der of the body, legs, labrum and anteimjo being flavate or 

 clouded slightly Avith brownish; they are very rare although 

 the species ma}' })erhaps be relatively more numerous. 



-i — M. alutacea n- sp- — Rather robust; beail fvisco-castaueous or nearly 

 piceous-black; prouotum and abdomen couculoroiis, pale castaneons; elytra 

 still paler, Ijrownish-testaeeous; legs uuiformlj' tlavate; anteunju uuiformly 

 pale reildisli-flavate throughout; palpi flavate; pubescence fiue, moderately 

 dense, coarser and more conspicuous on the elytra; integuments alutaeeous. 

 Head axindeKate, as wide as long; sides parallel, short and distinctly arcuate; 

 base truncate, angles broadly rounded; eyes very large, at scaicely their owu 

 lengths from the basal angles, not prominent, rather cjarsely granulate; 

 epistoma rather strongly produced, sides str.inglj'- convergent toward the 

 apex, truncate anteriorly; anteunal tuberculatious rather strong, small; sur- 

 face moderately convex, extremely minutely and densely punctate, with a 

 very narrow median impuuctate line, having two widelj' distant, annular, 

 setigerous punctures between the eyes and one behind each autenual tuber, 

 culation, also several small ones near and behind the eyes; antenn;© rather 

 rol)i]st, slightly longer than the head and protliorax together, basal joint 

 about three times as long as wide, second two-thirds as long as the third, 

 nearly as long as the fourth, joints four to ten decreasing in length, the latter 

 scarcely as wide as loug, eleventh ovoidal, obtusely iicuminate, much shorter 

 than the two preceding together. Protliorax very slightly wider than loug, 

 sub-equal in width to the head; sides very feebly convergent from apex to 

 Ijuse, the latter narrowly truncate in the middle; apex broadly and rather 

 feebly arcuate, narrowly and feebh' sinuate in the nnddle; apical and basal 

 angles equally and very broadly rounded; disk transversely and very feebly 

 convex, extremely minutely and densely pimctate; punctures slightly more 

 sparse near the middle, where there is a very narrow and obscure median 

 impunctate line. Elylra at base very slightly wider than the prouotum; sides 

 nearly parallel, very slightly arcuate; together broadly and feebly sinuate at 

 apex; nnter angles rounded; disk quadrate, one-fourth longer than the prouo- 

 tum, feebly convex, feebly impressed on the suture toward base, the suture 

 not elevated, very minutely, evenly and densely grauulose; the granulations 



