354 Trans. Acad. Sci. of St. Louis. 



the abdomeD; head longer than wide, the eyes well developed and 

 Blightly prominent; antennae as long as the head and prothorax, dls- 

 tinctly'iand gradually incrassate distally, the second joint as long as th« 

 next two combined, the subapical transverse; prothorax rery slightly 

 wider than the head and almost as long as wide, widest anteriorly, 

 where the sides are rounded, thence rather strongly converging and 

 straighter to the obviously rounded basal angles, the surface rather 

 broadly but feebly impressed along the median line almost to the apex; 

 elytra not quite as wide as the prothorax and three-fourths as long, 

 angularly emarginate toward the suture at tip, the sides feebly diverg- 

 ing from the humeri, which are gradually rounded to the prothorax and 

 not exposed at base; abdomen but little longer than the remainder of 

 the body, parallel, as wide as the eljtra, the first three tergites very 

 narrowly and extremely feebly impressed at base; hind tarsi shorter 

 than in fletcheri and with the basal joint distinctly longer than the sec- 

 ond — not shorter as in maritima, the claws minute. Length 1.8 mm.; 

 width 0.3 mm. California (Sta. Barbara) obscnra n. sp. 



The basal impressions of the abdomen are much larger 

 and deeper in fletcheri than in maritima or ohscura and the 

 last may be distinguished from maritima by its smaller size, 

 relatively narrov^er prothorax, darker color, longer basal joint 

 of the hind tarsi and closer abdominal punctuation. 



Amblopusa Csy. 



The chief points of distinction between this genus and 

 Bryobiota Csy., are the very broad sub vertical hypomera and 

 short third antennal joint of the former. In the latter genus 

 the hypomera, although only feebly inliexed, are narrow, as 

 usual, and the third antennal joint is distinctly elongate, in 

 fact almost as long as the second ; the eyes, also, although small 

 and coarsely faceted, are better developed. The following 

 species departs radically from brevipes in its larger size, very 

 much longer tarsal claws and more developed eyes : — 



Form slender, parallel, dull, very minutely and densely sculptured, the punc- 

 tures very flue, clot-e-set and indistinct, iromewhat more visible on the 

 elytra, extremely minute, close-set but evident on the abdomen, which is 

 only very obsoletely reticulate and rather shining; color pale rufo- 

 lestaceous, the abdomen black, feebly paler at tip, the legs pale; pu- 

 bescence rather long, pale and conopicuous except on the abdomen; 

 head large, scarcely longer than wide, feebly inflated at base, subde- 

 pressed, feebly impressed on the median line toward base, the eyes 

 small, evenly oval, consisting of about twenty coarse facets, the pos- 



