CALIFOUXIA ACADKMV OF SCIKXCKS. 29 



coarsely, very feebly and sunifwliat sparsely punctate; median liuc broad; 

 epistoma moderately produced, broadly' and feebly arcuate at apex; antenual 

 tiibercnlations feeble, not prominent; antenna; nearly as long as the lie id 

 and prothorax together, second joint slightly shorter than the third and much 

 longer than the fourth, not very robust, third three times as long as wide. 

 Prothorax just perceptiblj' narrower than the head, very slightly longer than 

 wide; sides parallel, nearly straight in the middle; base and apex broadly, 

 nearly evenly and rather strongly arcuate;, the latter very slightlj' the more 

 strongly so; nuchal emargination much more than one-third as wide as the 

 disk, broadly and very feebly incurvate; anterior and posterior angles broadly 

 and nearly etpially rounded; disk broadly and rather feebly convex, rather 

 coarsely, sparsely and excessively feebly punctate in the middle, the punc- 

 tiires beccnning liner, more distinct and denser toward the sides; median im- 

 puuctate area rather broad. Elytra at base distinctly wider than the protho- 

 rax, sliglitlj' wider than the head; sides parallel, feebly and nearly eveulj' 

 arcuate; together broadly, roundly and moderately sinuate behind; disk one- 

 fourth longer than wide and one-third longer thi^u the prouotum, rather 

 coarsely, densely, cveidy and sub-asjjerately punctate. Abdomen at base dis- 

 tinctly narrower than the elytra; sides parallel and nearly straight; surface 

 very minutely, feebly, densely and sub-asperately punctate; border rather 

 narrow and deep, slightly paler in color. Le<j>i slender; first joint of the pos- 

 terior tarsi one-half longer than the second, sub-ecpial in length to the fifth. 

 Length 4.0 mm. 



Sonoma Co., 1 o . 



Resembles the preceding two species in its elongate pro- 

 thorax, but possessing a still diti'erent modification of the 

 male sexual characters. The fifth segment is broadly eniar- 

 ginate nearly throughout its width at apex, the sides of the 

 emargination being feebly convergent and nearly str;wght, 

 each having aporrected fringe of seven rather widely-s[)aced 

 spinules; the median process is very short and broad, being 

 twice as wide as either of the fimbriate sides adjoining; it is 

 broadly, feebly and evenly arcuate throughout its width at 

 apex, and Avithout any appearance of lateral teeth; sixth seg- 

 ment strongly and ])arabolically emarginate at apex, the 

 notch being nearly one-half wider than deep. 



METAXYODONTA u. gen. 



In this genus, ro})resented by two closely-allied spe- 

 cies, the form and general appearance again difier most 



