282 Annals Entomological Society of America |Vol. VIII, 
parallel wavy lines. Tip of valves of the ovipositor, distal fourth of 
abdomen above, a broad ( nearly round) cross-stripe just cephalad of 
this and cephalad of this (at about the middle of the abdomen), a 
smaller, semi-circular spot, black. Also cephalad of the latter a mesal 
dot (at proximal third of the abdomen or less). Venation black, the 
wings hyaline. Proximal one-eighth of abdomen zneous black. Head 
with scattered punctures. Scutellum with two pairs of long sete, 
otherwise naked, scaly. Funicles 1-8 subequal, each about twice longer 
than wide, 1 a little more, about twice the length of the pedicel which is 
subequal to club 8. Mandibles 5- and 6-dentate; two ring-joints. 
Described from one female taken by sweeping grass, Chevy 
Chase Lake, Maryland, April 24, 1915. 
Type: Catalogue No. 19380, U. S. N. M., the female on a 
tag, the head on a slide. 
7. Merisus Walker. 
Differs from the pirenine genus A pirene Girault in bearing but one 
spur on the caudal tibiz and the solid antennal club lacks a distinct 
terminal nipple, yet is tapering at apex. (The nipple is present some- 
times. ) 
(1) Merisus flaviventris new species. Female. 
Length, 2.10 mm. Abdomen larger than the rest of the body, 
depressed. Differs from the genotype of Apirene only in that the 
abdomen is wholly lemon yellow except tip of ovipositor valves (net 
visible from dorsad) and the brown meson of the abdominal venter. 
Also the antennal club is white-yellow, the antennz brown, the scape 
darker. Base of cephalic femora black. Funicle 1 is shorter 1n relation 
to the pedicel, 2 is a little larger than 3, 6 subquadrate, subequal to 3-5. 
Mandibles 4-dentate. 
Described from one female taken by sweeping grass, Chevy 
Chase Lake, Maryland, April 24, 1915. 
Type: Catalogue No. 19381, U. S. N. M., a female on 
tag, the head and hind legs on a slide. 
(2) Merisus semilongifasciata new species. 
Female: Differs from the preceding species in having the flagellum 
black except the yellow-white club, the base of the abdomen rathcr 
narrowly black and the abdomen with a short, black, lateral marginal 
stripe (partly broken into three spots) running to about the middle and 
commencing a short distance away from the basal marginal stripe. 
Also the funicle joints are all a little longer. Clypeus longitudinally 
striate. 
From one female taken with the preceding. 
Type: Catalogue No. 19382, U. S. N. M., the female and 
slide as in the preceding. 
