130 MEMOIRS ON THE COLEOPTERA. 



much longer than the fourth. Length 1.3 mm.; width 037 mm. Cali- 

 fornia (Monterey). 



To be known readily by the more broadly fusoid outline, with the 

 rather small head swollen basally, the asperate punctures and its 

 small size; it is more nearly a Datomicra than the members of the 

 preceding subgenus. 



Datomicra (Oligomia) perpaula n. sp. Similar to the preceding in color- 

 ation and sculpture but narrower, more parallel and with a relatively much 

 larger head, which is similarly rather transverse and basally inflated, the 

 eyes smaller, less prominent and at much more than their own length from 

 the base, the carinse very fine and much abbreviated; antennae nearly similar 

 but a little shorter and sensibly more incrassate distally, the second joint 

 very much shorter than the first and much longer than the more strongly 

 obconic third, the fourth a little wider than long, the outer joints distinctly 

 transverse; prothorax distinctly though less greatly wider than the head, 

 as wide as the elytra, similarly transverse, parallel and strongly rounded at 

 the sides, with only a small rounded basal impression; elytra similar though 

 shorter, the suture barely a fourth longer than the prothorax; abdomen 

 similar, moderately tapering throughout, at base almost as wide as the elytra. 

 Length 1.15 mm.; width 0.26 mm. California (Siskiyou Co.). 



Evidently a close congener of the preceding but more slender 

 and with a larger head, shorter antennae and elytra and other 

 divergent characters. 



Monadia n. subgen. 



The middle coxae are well separated, the mesosternal process 

 much more prolonged than in the preceding groups, extending to 

 apical fourth of the coxae, with its apex somewhat acute but not 

 aciculate and separated by a comparatively short interval from 

 the rather large and sharply angulate metasternal projection. The 

 coloration of the body departs very much from typical Datomicra, 

 resembling more Sableta and its coordinate groups, which also have 

 the hypomera horizontal and warped, and it is quite possible that 

 Monadia would be more appropriately placed as a subgenus of 

 Sableta. 



Datomicra (Monadia) lucana n. sp. Subparallel, elongate, rather convex, 

 moderately shining, the punctures very fine, not dense and not evidently 

 asperulate, sparse on the strongly shining abdomen; color pale flavo-tes- 

 taceous, the head blackish, the elytra brownish, clearer basally except at 

 the suture, the abdomen with the entire fourth tergite blackish, more diffused 

 on the under surface, the legs very pale; pubescence pale, not very close; 

 head orbicular, wider than long, the eyes large, convex, at less than their 



