48 CYRTIDAE OF NORTH AMERICA 



fourth vein do not quite reach the margin. Antennae yellowish-brown at the 

 base; pubescence of the eyes long and dense. Thorax with very dense, soft, 

 erect, grayish-yellow pile; the greenish-black, shining ground color but little 

 visible under it. Abdomen brownish-black, moderately shining, densely 

 clothed with brownish -yellow erect pile; the penultimate segment and the hind 

 margin of the preceding one are clothed with recumljent yellowish-white pile. 

 Wings slightly tinged brownish, much less than in 0. diligens, but more uni- 

 formly, as the paler color of the tip is not apparent. The rest as 0. diligens." 



Habitat. — California (G. R. Crotch). One specimen. 



ACROCERA 



Acrocera Meigen, Illiger's Mag. f. Ins., ii, p. 266, (1803). 

 Paracrocera Mik, Wien. Ent. Zeit., v, p. 276, (1S86). 



Antennae placed at extreme top of head, ending in a long thin 

 arista. Venation very much reduced. Proboscis absent or 

 aborted. 



Head of male larger than that of female, almost all eyes except 

 for a rather broad vertical triangle, the tiny mouth-part, and 

 the inflated back of the head; head broad ovate when seen from 

 above, but circular when seen from in front; mouth-parts very 

 small and almost at the bottom of the head; proboscis short and 

 withdrawn; back of head rather inflated but close to the thorax 

 and consequently the neck is barely visible; ocelli three. Eyes 

 bare, touching beneath the antennae quite down to the tiny 

 mouth-part. Antennae inserted in the front part of the vertical 

 triangle, apparently two jointed because the basal joint is con- 

 cealed; next joint apparently orbicular and last joint ovate with 

 a long thin apical arista. 



Thorax strongly arched, with none of the calli very prominent 

 (unless from color) though the post alar calli are often quite 

 conspicuous. Pubescence abundant, but usually short and not 

 concealing the ground color, recumbent and coarse. Outer part 

 of male genitalia dilated and prominent. Female genitalia pro- 

 jecting and of characteristic form. 



Legs rather short and stout and without spurs or projections. 

 The tarsi are as in Ogcodes but the claws are even longer, and the 

 pulvilli shorter and more pad-like. The abdomen is large and 

 balloon-hke, conico-globular, with five visible segments; the 

 pubescence is very short and adpressed. 



Wings shorter and smaller in male than in female; venation 

 reduced and some of the veins hard to homologize. There is a 



