238 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 99 



CARDIOCHILES DILATUS. new species 



Female. — ^Length 6 mm. Head and thorax black ; orbits and middle 

 part of clypeus ferruginous ; middle of mandible dark red ; wings fulig- 

 inous, darkest apically, stigma and costa more or less ferruginous, at 

 least basally ; coxae and trochanters black, femora ferruginous, tibiae 

 ferruginous, apex of hind tibia blackish, fore tarsus blackish, basal half 

 of fore basitarsus ferruginous, middle tarsus blackish, hind tarsus 

 black; abdomen ferruginous, median portion of first tergite black; 

 ovipositor sheath black. Pubescence of head short; antenna 32-seg- 

 mented in type; eye bare; ocelli elevated; vertex smooth, polished; 

 f rons smooth, polished, with a transverse pit below anterior ocellus ; 

 clypeus slightly elevated along basal margin, its apical margin trun- 

 cate, slightly arched, and not notched ; temple slightly wider than eye 

 in dorsal view ; malar furrow about half as long as basal width of 

 mandible; galea much shorter than long axis of eye. Posterior por- 

 tion of lateral face of pronotum weakly rugose ; median lobe of meso- 

 scutum with a shallow longitudinal depression each side of the median 

 line ; notaulices narrow, finely f oveolate ; upper groove of mesopleuron 

 foveolate, its lower groove weakly foveolate, metapleuron rugose, ex- 

 cept lower part of anterior portion which is smooth ; propodeum finely 

 rugose, its carinae, except pleural carinae, low and very indistinct. 

 First abscissae of radius and basal vein about equal ; third and fourth 

 abscissae of cubitus about equal ; recurrent vein and second abscissa of 

 cubitus about equal ; nervulus postf ureal by 0.80 its own length ; first 

 and second abscissae of submedius about equal ; interanal vein repre- 

 sented by a short stub continued as a pigmented line. Second and fifth 

 segments of fore tarsus about equal ; apex of hind tibia thickened on 

 outer margin and expanded into a flaring process ; inner spur of middle 

 tibia slightly less than 0.67 as long as basitarsus, second and fifth tarsal 

 segments about equal ; inner spur of hind tibia about half as long as 

 basitarsus, basitarsus about as long as the next three seginents com- 

 bined, second tarsal segment longer than the fifth ; hind claws pectinate 

 basally. Second tergite shorter than the third medially ; hypopygium 

 large but not surpassing last tergite, about as long as first three tergites 

 combined ; ovipositor sheath thinly pubescent, about as long as the 

 l^ypopygium (pi. 5, fig. 22). 



Male. — Essentially similar to the female except that the abdomen is 

 more extensively marked with black and the femora are more or less 

 blackish basally. 



ry;?e.— U.S.N.M. No. 58286. 



Type locality.— Y^Yvcio, Calif. (April 28, 1937, M. Cazier) . 



Described from the type, four males, Roseville, Calif., swept from 

 grass, April 10, 1931, C. C. Wilson, and one male and one female from 

 Los Angeles, Calif. 



