1919] Bequaert — Nearctic Psammockarids of Genus Aporinellus Banks 1 17 



species can claim as peculiar to itself is that of filling up the partly 

 made nests that it is about to abandon. We have never seen the 

 sense of order carried to so high a point in any other wasp" (G. and 

 E. Peckham). After digging is completed, the spider is dragged 

 inside and the egg fastened to the side of the abdomen of the prey ; 

 the entrance is then carefully filled up. When finished the burrow 

 is a small gallery running down obliquely for an inch and a half in 

 the ground. The spider is only slightly affected by the poison of 

 the sting, this wasp depending probably more upon packing her 

 victim in tightly to keep it quiet. 



The following key will aid in separating the females of the 

 species known from the eastern and central states, all of which I 

 have examined in nature. In addition there are several Califor- 

 nian species tabulated by Mr. Nathan Banks in a forthcoming 

 paper, 



1. Body almost entirely reddish; head except the clypeus, and 



antennae beyond the second joint, black. Wings blackish at 

 tip, the second cubital cell scarcely longer than broad. Face 

 below, posterior margin of pronotum and apical fasciae of the 

 abdominal tergites feebly sericeous. Tarsal comb long. 



Length: 5 to 6 mm. (cf unknown) rufus Banks. 



Not reddish throughout 2. 



2. Legs, at least the hind pair, mostly reddish 3. 



Body and legs entirely black, with sericeous or silvery pubes- 

 cence 5. 



3. Body silvery, with distinct sericeous apical fasciae on the abdom- 



inal tergites. Color black; the mandibles in their middle, 

 the hind tibiae and femora entirely and the basal joints of the 

 hind tarsi partly, reddish. Head and tarsal comb as in 

 fasciatus, from which this species differs in the second cubital 

 cell being only 1^ as long as broad. Length: 5 to 7 mm. 



(cf unknown) ferrugineipes (Viereck). 



Body smooth, very feebly pruinose, not sericeous, the abdomen 

 without silvery fasciae. Second cubital cell ^ to ^ as long as 

 broad 4. 



4. First three abdominal segments and all the legs for the larger 



part reddish. Ocellar triangle little flattened, the lateral 

 ocelli only feebly nearer to the eyes than to each other. Tar- 



