384 
JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 11 
a narrowly rounded apex. Mesonotum dark brown, with moderately thick sub¬ 
median lines of short, silvery scales and with the sublateral areas sparsely clothed 
with somewhat broader scales. Scutellum dark brown, thickly clothed with silvery 
scales. Postscutellum dark brown. Abdomen sparsely clothed with fuscous hairs, 
deep red. Halteres yellowish basally, fuscous apically. Ovipositor probably one- 
half the length of the bodv, fuscous yellowish, the terminal lobes yellowish orange. 
Type Cecid. a 2917. 
Larva. Length 4 mm. Moderately long, stout, strongly segmented, with con¬ 
spicuous tubercles, the extremities tapering, a variable reddish orange. Head small, 
subconical, the outer walls apparently slightly chitinized and at the posterio-lateral 
angles chitinous projections with a length twice that of the head. Antennae slender, 
conical. Breastbone irregular, expanded and truncate anteriorly. The lateral and 
posterior spiracles on tubercles, each supported by a black chitinous, cup-shaped 
structure; those of the anal pair larger and strongly dentate. Abdominal segments, 
except the eleventh and twelfth, each with a submedian pair of long, fleshy tubercles, 
the length approximately one-third the body width, most of them more or less furcate. 
The lateral tubercles support the spiracles and are about one-fourth the length of the 
subdorsal tubercles. Ventrally pseudopods are fairly well developed on the tenth, 
eleventh and twelfth segments, those on the last spine tipped and apparently with the 
same structure as the subdorsal tubercles. 
Onodiplosis sarcobati Felt. 1 The male described below for the 
first time was received May 20, 1918, from Professor Harold It. Hagan, 
Logan, Utah, and a series of both sexes were reared from bud galls on 
Sarcobatus vermiculatus, the adults issuing directly from the gall after 
the pupa had worked itself about three-quarters out of the deformity. 
Male. Length 2.5 mm. Antennae a little longer than the body, sparsely haired, 
pale yellowish, fourteen segments, the third and fourth free, the fifth having stems 
each with a length about twice its diameter; the basal enlargement subglobose with 
a sparse subbasal whorl of stout setae and a circumfilum with moderately short loops; 
the distal enlargement pyriform, with a length one-half greater than its diameter; a 
subbasal and subapical circumfilum, each with loops having a length less than the 
diameter of the enlargement; terminal segment, basal enlargement subglobose, basal 
portion of the stem produced, slender, the distal enlargement irregular and tapering 
to an obtuse apex. Palpus consisting of an irregular, tapering setose segment with a 
length about twice its diameter. Mesonotum dark yellowish brown. Scutellum and 
postscutellum very dark brown, almost black. Abdomen sparsely haired, fuscous 
yellowish, genitalia somewhat darker. Wings as in the female. Halteres whitish 
basally, fuscous yellowish apically. Coxae dark brown, legs mostly pale straw. Geni¬ 
talia; basal clasp segment stout, with a length about twice its diameter, terminal 
clasp segment moderately long, swollen subapically, the chitinous tip pectinate. 
Dorsal plate long, deeply and triangularly emarginate, the lobes broad, broadly 
rounded, ventral plate short, broadly emarginate, lobes broadly rounded. Harpes 
widely separated apically, roundly tapering and sparsely setose. Style short, 
chitinized apically. Cecid. a 2914. 
Pupa. Length 2.5 mm. Head, thorax, antennae, wing and leg cases all a some¬ 
what variable fuscous yellowish. Abdomen red, smooth. 
1 1916, Felt, E. P., N. Y. Ent. Soc. Journ., 24: 176. 
