206 
NORTH AMERICAN MYRMOSIDAE 
Type. — Berkeley, California, June 30, 1898, [Cornell University, 
No. 118.1]. 
Brachycistis (Brachycistis) nevadensis Fox, cf. 
Genitalia: Sagitta long, slender, blade-like and curved; volsella an in- 
conspicuous scale; squama with an entire apical margin; uncus from a dorsal 
view slightly and gradually thickened toward the apex, bearing a wide apical 
notch, from a lateral view rather strongly thickened before the apex and de- 
•curved (figure 43). 
Described and figured from the type specimen. 
Nevada: [Type, American Entomological Society]. 
Brachycistis (Brachycistis) inaequalis Fox, cf. 
Genitalia: Sagitta long, slender, blade-like, curved, ending verj' little before 
the tip of the uncus; volsella reduced to a minute scale; squama rather slender, 
its lateral margin merging gradually into the posterior, which is not notched; 
uncus from a dorsal view slightly widened toward the tip, which bears a wide 
and deep semicircular notch, from a lateral view rather strongly thickened 
before the apex, decurved (figure 49).. 
Description and figure drawn from a paratype in the collection 
of the American Entomological Society. 
California: Los Angeles, Sejitember, [Type, Luiited States National 
Museum, paratypes, American Entomological Society]. 
Brachycistis (Brachycistis) eriopis new species 
d'. Mahogany red, the head much darker, the antennae and legs yellow; 
clothed with sparse, erect, yellowish pubescence; wings Iwaline, faintly clouded 
toward the apex; veins yellow to brown. Sc -f- R + M dark brown, the stigma 
golden 3 '-ellow. Length, 12 mm., stout. 
Head with few minute punctures; ocelli verj' large and prominent, a trans- 
verse rugosity behind them, a deep transverse impressed line immediateh' 
behind and a longitudinal one between them, measurements: .38 mm., .28 
mm., .5 mm. ; four inconsiiicuous raised points above the base of the antennae, 
the lateral ones transverse; inferior border of each antennal socket interiorly 
incrassate; cfvpeus slightly convex, shallowly emarginate, the edge not 
thickened; mandible with inner two teeth equal, short and blunt, an elevated 
curved carina extending half-way to the base; gular orifice narrow, its barely 
margined edge distant from the eye by considerably more than the length of 
the last segment of the labial palpi, and from the swelling at the condjde of the 
mandibles bj^ about twice the thickness of the same. Antenna crenulate; 
basal segment of the flagellum somewhat curved, a little more than twice as 
long (.68 mm.) as thick (.28 mm.). 
Humeral angles entirelj' rounded, indistinct; pronotum with onty sparse and 
Binall setigerous punctures; mesonotum polished, bearing minute irregularh' 
scattered punctures and distinct lateral grooves, deeply depressed in front of 
the scutellum; the latter convex, with a few small punctures; postscutellum 
