1929 ] 
New Species of Psammocharidae 
327 
black, tarsi brown, hind femora and tibiae red; antennae 
black. Pronotum and part of pleura sericeous. Wings 
hyaline, apex dark. Vertex considerably narrowed above, 
hind ocelli much closer to the eyes than to each other ; third 
joint of antennae plainly longer than the fourth; front tarsi 
with comb of long spines. Wings short and small, marginal 
cell fully twice as long as broad, submarginal short, not one 
and and a-half times as long as high, the two sides nearly 
meeting above, first recurrent vein received before the 
middle, second recurrent interstitial with end of the sub- 
marginal cell. 
Length 6 mm. 
From Martin, South Dakota, 12 Sept. (H. C. Severin). 
At once separated from A. rufus by thorax and base of 
antennae black. In structure it is near to A. ferrugineipes , 
both in wings and head, but differs in the red abdomen. 
Planiceps hesperus sp. nov. 
Black ; clothed with minute appressed pubescence, on 
vertex, pro- and mesonotum rather brownish, on clypeus, 
propodeum, pleura, and coxae white; la.st dorsal segment 
of abdomen of female red-brown; wings nearly uniform 
blackish. Face broad, scarcely narrowed above, vertex 
straight across, lateral ocelli about as near to eyes as to 
each other; pronotum long, fully two-thirds as long as 
broad in female, in male much shorter, nearly straight be- 
hind; propodeum without distinct furrow; legs with few 
very short spines on tibiae, long spur of hind tibia little 
more than one-half of basitarsus in the female, in male 
fully two-thirds of basitarsus. Wings with marginal cell 
small, more than twice its length before tip of wing, second 
sub-marginal cell small, triangular, receiving both recurrent 
veins, the discoidal cell below this very short, basal vein 
strongly bowed basally. 
Length $ 4.5 mm., $ 3 mm. 
Lone Mt., San Francisco, Calif., 25 April, 4 July (F. X. 
Williams) . 
In venation as well as general structure it is very similar 
to the eastern P. pulchellus, but separated by the black 
abdomen. 
