290 ENTOMOLOGICAL NEWS f Dec., '22 



stria and the elytral suture evenly, moderately punctate with setae similar 

 to those on disc of thorax ; punctures without regular arrangement ; 

 each stria has along its raised edge a row of setigerous punctures 

 slightly closer together than those on the disc ; parallel to this is 

 another single row of setigerous punctures more widely spaced. First 

 dorsal stria reaches but one-half the distance to apex ; remaining striae 

 extend to apex. 



Pygidium and propygidium evenly, moderately, punctate and setose. 



Prosternum finely punctate and rugose but lacking setae ; bordered 

 area contracted between the coxae, thence gradually separating to one- 

 half the length of the prosternum where they merge into the prosternal 

 surface, leaving the cephalic end of the margined area open. Cephalic 

 end of prosternum emarginate ; immediately caudad of the emargination 

 there is a slight indentation in the raised portion. Meso- and mcta- 

 sternum punctate and hairy. Legs evenly and moderately punctate on 

 the outer surface, setae shorter than those on upper surface of body. 

 Length 2 mm.; width 1.5 mm. 



Described from a series of nine specimens taken at North 

 Fork, California, in the nests of Formica plicicornisf Type in 

 my collection, paratypes in the collection of Mr. Henry Dietrich 

 who collected the species. 



Hetaerius nudus n. sp. 



Of the same form as sctosus, which it resembles in many respects ; 

 it has more yellow in the body color and is noticeably less convex. 



Vertex of head flat, evenly, moderately punctate, punctures with 

 short, squamose, recumbent hairs ; front impressed, finely rugose, im- 

 punctate ; labrum finely rugose, shining. 



Prothoracic disc evenly, moderately, punctured with minute, short 

 recumbent hairs jn each puncture; basal end of oblique depression broad; 

 lateral areas finely rugose, marked with a series of slightly raised lines 

 extending from transverse sulcus to the apex ; between these lines are 

 single rows of punctures bearing the same type of hairs as those on the 

 disc ; outer margin with a row of coarser, curved hairs ; inner margin 

 for half its length, beginning at transverse sulcus, with a single row of 

 flattened, recumbent hairs ; bulla finely rugose on outer half, which is 

 punctate with coarse, squamose, recumbent hairs, outer margin with 

 hairs like those on margin of lateral area, inner surface finely rugose, 

 impunctate. Carinae of the oblique sulcus not as widely separated at 

 base as in sctosus. Outer margin of lateral area while rounded shows 

 a slight tendency to angulation at one-third the distance from apex 

 to transverse sulcus. 



Elytra evenly, moderately punctured and with the same minute, 

 recumbent hairs as those on the prothoracic disc ; the first and second 

 dorsal striae of same length and not quite reaching to apical margin. 



