Coleopterological Notices, VII. 377 



base, gradually, arcuately narrowed in apical half, the apex nearly % as wide 

 as the base ; surface strongly, transversely impressed near the basal margin, 

 the ends of the impression foveate near each side of the disk. Elytra oval, % 

 longer than vpide, barely twice as long as the prothorax and scarcely more than 

 "% wider, widest and rather more strongly rounded at the sides before the 

 middle ; humeral plica narrow, rather long but feeble, the corresponding im- 

 pression slight ; fovese small ; subsutural impressions narrow and strong, the 

 suture finely beaded basally, the bead very feebly and gradually wider toward 

 base. Legs of the usual length, the femora moderately clavate ; hind tarsi 

 filiform, with the first three joints equal, the fourth a little shorter. Length 

 1.25 mm. ; width 0.4 mm. 



Texas (Colorado River). 



This species is very distinct from any other of this peculiar 

 group in the elongate-oval and narrow form of the head, form of 

 the pronotum and in many other structural features. The sex of 

 the unique type is not determinable. 



12. E. merus n. sp. — Eather narrowly oval and very feebly ventricose, 

 polished, subimpunctate, pale rufo-testaceous throughout, the legs and antennae 

 a little paler and more brownish; pubescence abundant, pale, stiff, somewhat 

 long and very coarse but recurved on the elytra, where there is an admixture 

 of a few slightly longer erect setae. Head well developed, fully as long as 

 wide, prolonged unusually behind the eyes and sulparabolic, the eyes moder- 

 ate in size but very convex and prominent, anterior; antennal tubercles rather 

 pronounced ; clypeus simple and rectilinearly truncate at apex ; antennal cavi- 

 ties well separated, the intervening surface not modified. Antennse short and 

 rather stout, scarcely as long as the head and prothorax, the club pronounced 

 but not very abruptly formed; second joint fully as long as the first and not 

 narrower, but obconic, rather longer than the next two and distinctly thicker; 

 three, four and six almost equal, much wider than long; fifth a little larger 

 and more oval, almost as transverse; seventh }4 wider than the sixth, nearly 

 }4 wider than long ; eighth % wider than the preceding, transversely suboval, 

 34 wider than long ; ninth and tenth nearly similar, almost }4, wider than the 

 eighth and about % "wider than long; eleventh scarcely visibly thicker, only 

 slightly longer than wide, much shorter than the two preceding. Prothorax 

 rather longer than wide and fully % wider than the head, narrowed slightly 

 at base and gradually and arcuately toward apex ; surface with two submedian 

 foveae. near the base, joined by a deep and conspicuous subarcuate impression. 

 Elytra barely % longer than wide, scarcely twice as long as the prothorax and 

 about ^ wider, oval, widest but little before the middle, the sides evenly and 

 broadly arcuate throughout; humeral plica narrow and strong, the subhumeral 

 impression distinct; outer fovea large and strong, the inner minute; subsutural 

 impressions rather narrow, long and distinct; suture beaded in almost basal %, 

 the bead with a small expansion at the base. Legs moderate, the femora all 

 rather feebly clavate. Length 1.1 mm.; width 0.42 mm. 



Texas (Colorado River). 



