134 MEMOIRS ON THE COLEOPTERA 



as wide, parallel and feebly, evenly arcuate at the sides, widest across 

 the middle of the tempora, which there are a little more prominent than 

 the eyes, the latter small, at fully one-half more than their own length from 

 the base, the carinse wholly wanting, except finely and feebly at base; 

 antennae moderately long, blackish with the basal joint paler, moderately 

 slender, gradually becoming notably thick distally to the apex, the second 

 joint as long as the first, the third a little shorter, two-thirds longer than 

 the fourth, which is a little longer than wide, the outer joints transverse, 

 the tenth fully a third wider than long, the last acutely ogival, shorter 

 than the two preceding; prothorax but very little wider than long, parallel 

 and evenly, very moderately rounded at the sides, the median line very 

 finely and feebly impressed in about basal half and with a small feeble 

 rounded ante-scutellar impression; elytra but slightly transverse, with 

 somewhat diverging straight sides, at base but very little wider, the suture 

 two-fifths longer, than the prothorax, the apices not at all sinuate; ab- 

 domen at base slightly narrower than the elytra, the sides just percep- 

 tibly converging and nearly straight thence to the apex of the fifth ter- 

 gite, which is barely at all longer than the fourth; middle coxse contiguous, 

 the metasternal line behind them transverse and almost straight. Length 

 3.0 mm.; width 0.7 mm. California (San Mateo Co.), Baker. 



Very distinct from the two preceding in having no infra-lateral 

 cephalic carinse except basally, in its smaller and more anterior 

 eyes and in the transverse and not more than feebly arcuato- 

 truncate metasternal line behind the coxse. Both the upper and 

 lower plates of the sixth abdominal segment are very broad and 

 obtusely rounded in the female type. 



The following may be regarded as a subspecies of badeola, for 

 it is so similar in most of its structural characters that it would 

 seem best not to give it full specific value without further light on 

 the subject: 



Metaxya mateana n. subsp. Similar to badeola in general character- 

 istics of sculpture, vestiture and coloration but very much smaller in size 

 and more parallel in form; head similar though relatively larger, the 

 antennae of like construction but not quite so thick, the joints after the 

 fourth similarly abruptly thicker than one to four but not so markedly 

 so and thence rather less incrassate to the tip, the fifth distinctly longer 

 than wide, tenth very little wider than long; prothorax also relatively 

 larger and about as wide as the elytra, of nearly similar form and dorsal 

 impression but almost as long as wide; abdomen narrower and parallel, 

 the sixth ventral in the type only three-fifths as wide as the fifth tergite 

 and broadly rounded. Length 2.2 mm.; width 0.55 mm. California 

 (San Mateo Co.), Baker. 



I think it hardly possible that these two forms could have any 

 closer relationship than that indicated; the infra-lateral cephalic 



