PARASITIC WASPS OF BRACONID SUBFAMILY EUPHORINAE 9 
The Genus CRYPTOXILOS Viereck 
Crypiozijos Viereck, U.S. Natl. Mus. Proc. 40: 180, 1911. (Genotype, Cryptozilos 
dichromorphus Viereck.) 
A rather anomalous genus of Euphorinae, distinguished especially 
by its depressed thorax, by the strongly hairy eyes of the female, and 
by the combination of the absence of recurrent vein with the presence 
of a well-developed arcuate medius and an exserted ovipositor. Fur- 
ther characteristics of the genus follow: 
Head not or scarcely broader than thorax, subquadrate, completely margined 
behind; eyes short oval, prominent, strongly convergent in female; ocelli very 
small; frons sloping gradually; face short; maxillary palvi 5-segmented; labial 
palpi 2-segmented; antennae short, with few segments; temples broad, convex. 
Thorax compact, distinctly broader than high; pronotum not conspicuous; 
dorsal face of propodeum long and nearly horizontal, its posterior face short, 
abruptly declivous and somewhat excavated; femora short and a little thickened; 
stigma short and broad; radial cell on wing margin not longer than stigma; first 
abscissa of radius punctiform, the second weak or obsolete apically; first cubital 
and first discoidal cells separated; two cubital cells; submedian cell very narrow; 
medius somewhat curved; subcostella, nervellus, and submediella absent; abdo- 
men petiolate, more or less pyriform; first tergite narrow; combined second and 
third tergites comprising nearly all of remainder of abdomen, not carinate laterally, 
overlapping beneath; ovipositor prominent. 
Up to the present the genus has been known only from the unique 
male type of C. dichromorphus Viereck, a South American species. A 
new Nearctic species, of which both sexes have been obtained, is 
described below. 
CRYPTOXILOS CONVERGENS, new species 
(Figs. 1, B; 2, A and B) 
Euphorus phloeotribi Ashm., MS., Chittenden, U.S. Dept. Agr., Div. Ent., Insect 
Life 5: 249, 1893. 
This species closely resembles dichromorphus but can be distin- 
guished by its somewhat narrower face, by its closely placed 14-seg- 
mented antennae, and by the relatively longer first flagellar segment, 
which is distinctly longer than the second. 
Female.—Length 2mm. Head large, subquadrate, a little wider than thorax; 
frons long and very gradually declivous; eyes large, prominent, thickly hairy, 
widely separated behind but very strongly convergent anteriorly, with the result 
that the face is exceedingly narrow, in its narrowest part only half as wide as 
long; temples and cheeks broad, strongly convex; ocelli very small, ocellocular 
line four times diameter of an ocellus; head completely margined behind; antennae 
about as long as head and thorax combined, 14-segmented; scape only a little 
longer than thick; pedicel about as long as thick; flagellum tapering slightly to the 
apex, the first segment the longest and thickest, about as long as scape and pedicel 
combined, the second much shorter than first and slightly shorter than third, 
remaining segments subequal, about twice as long as broad. 
Thorax compact, narrowing behind; notauli more or less distinctly indicated by 
closely punctate lines; mesoscutum mostly smooth, with a punctate area medially 
behind; furrow at base of scutellum broad, coarsely foveate; scutellum small, 
polished; propodeum smooth basally, rugulose beyond, dorsal face long, with a 
median longitudinal carina, posterior face short and broadly, shallowly excavated; 
mesopleurum smooth on anterior half, posterior half and metapleurum with large, 
closely placed punctures; all femora smallest at base, noticeably thickened on 
posterior two-thirds; posterior coxae smooth; stigma very short and broad, more 
than two-thirds as broad as long; radial cell on wing margin about as long as 
stigma; radius originating a little beyond middle of stigma, the first abscissa very 
short, punctiform, intercubitus almost reaching stigma; second abscissa of radius 
straight, very weak, more or less obsolete toward wing margin; submedian cell 
very narrow; first brachial cell not defined; first cubital and first discoidal cells 
49365—36——2 
