282 
NORTH AMERICAN MYRMOSIDAE 
Subgenus Brachycistellus Baker 
Two undescribed species before me agree with the genotj'^pe in 
venation, but lack the high arched mesonotum described by 
Baker and have the ocelli enlarged. I have not seen the geno- 
type, but I can not look upon the two here described as being 
more than subgenerically distinct from Brachycistis. 
Type: Brachycistellus figitif or mis Baker, genus monobasic. 
A Key to the Species of the Subgenus Brachycistellus 
1. Ocelli minute; mesonotum very high, arched figitiformis (Baker) 
Ocelli ver}" large; mesonotum not particularly high, convex but not strongly 
..arched (2) 
2. Hind ocelli about equidistant from each other and from the eyes; from a 
lateral view the short first abdominal segment is rather gibl^ous, strongly 
constricted dorsally from the second; length, 3.2 mm. 
paupercula new species 
Hind ocelli nearly twice as far from each other as from the eyes; from a 
lateral view the short first segment is not gibbous and not at all constricted 
dorsally from the second; length, 4.7 mm marcida new species 
Brachycistis (Brachycistellus) figitiformis (Baker), cf. 
1907. Brachycistellus figitiformis Baker, Invertebrata pacifica, 1 :178. 
California: Claremont, 1 cf, type (C. F. Baker), [Pomona College ? ]. 
Brachycistis (Brachycistellus) paupercula new species 
Piceous, i.e. a little darker than Vandyke brown, the legs except the 
coxae, the antennae, and the tegulae honey yellow. Wings hyaline, the veins 
very pale, the stigma piceous. Length, 3.2 mm. 
Surface of the head and thorax polished and shining, with a few remote 
and large punctures, bearing erect hairs; diameter of the hind ocelli .13 mm., 
.their distance from the eyes .13 mm., from each other .17 mm., from the front 
ocellus .06, diameter of the latter .13 mm.; front without ridges or tuliercles 
above the antennae, the rim of the antennal sockets not thickened beneath; 
clypeus elevated into a prominent, somewhat transverse tubercle, its anterior 
margin weakly emarginate; mandibles without a distinct carina on the surface, 
with two preapical teeth. 
Humeri rounded; pronotum large; mesonotum convex, without furrows 
'excejit two lateral furrows posteriorly; scutellum prominently convex; pro- 
podeum short, rounded, without angles, with a median longitudinal furrow, 
without carinae, its surface especially laterally a little tessellated. 
Spines of the tibiae very inconspicuous. Wing venation as shown in figure 
50. 
