1864.] 
499 
black, the trochanters, the knees and the tarsi except their tips, honey-yellow 
or dull rufous, each successive pair of legs a little darker than the preceding. 
Wings hyaline; veins rather fine, the principal ones lightly tinged with brown, 
the cubitus hyaline and indistinct. Areolet moderate, its two basal sides hya¬ 
line. Eadial area about times as long as wide, distinctly closed by a brown¬ 
ish vein, the areolet placed scarcely more than i of the Way from its basal end. 
Length 9 -^8—-.10 inch; % unknown. 
Eight 9 , bred at the same time with the following species and from 
the same galls, (^q, podaqrse n. sp.) May be easily confounded with 
the dark varieties of that species, but differs in being slenderer, in the 
antennae being longer and slenderer and having one more joint 9 ? in 
the “ ventral valve” being unarmed and much shorter, and sub hyaline 
and thin not thick and black, and in the radial area being proportionally 
longer and in a more acute angle at tip (30^^ instead of 45“.) From the 
true gall-fly that produces the gall q. podagrse it is at once distinguished 
by its radial area being closed and proportionally shorter, and having 
the areolet placed further from its base. 
22 . Synerges rhoditiformis n. sp. 9 • Rather robust, honey-yellow or ru¬ 
fous, ranging both in the living and the dried 9 > t>nt not in %, to' very dark 
reddish brown, or almost brown-black. Head glabrous opaque, with a black 
spot enclosing the ocelli and sometimes extending laterally nearly to the eyes 
and in front to the origin of the antennae; extreme tips of mandibles black. 
Eyes black. Antennae honey-yellow or rufous 9 » dark 9 9 reddish- 
brown, f as long as the body in , a little over ^ as long in 9 > 15-jo^nted in % 
joint 3 mueh excised below and 13—15 subequal, 13-jointed 9 the last joint ^ as 
long again as the penultimate and occasionally in certain lights with a slight 
transverse medial impression. Collare glabrous opaque or almost microscopi¬ 
cally rugose, always with an equilaterally obtrigonate black spot covering its 
whole dorsal length. Thorax laterally a little polished, dorsally opaque and 
with fine transverse rugse; two acute strise converging on the seutel and an in¬ 
termediate one, all three often indistinct throughout or obsolete in front. Seutel 
finely rugose. The entire meso- and meta-notum black, the black color ceasing 
suddenly on the suture dividing the mesonotum from the collare. Abdomen 
black, highly polished, often in the paler specimens laterally and beneath pi- 
ceous or rufous, joint 2 dorsally describing a circular arc of 30°. “Ventral 
valve” 9 horny and thiek, very large, extending beyond the tip of the dorsum, 
its color a highly polished black, its tip, when viewed laterally, in an angle of 
45° terminating in a short, obtuse, slender, setiform, hairy appendage, chan¬ 
nelled above for the reception of the ovipositor. Sheaths of the ovipositor pro¬ 
jecting but slightly from the “dorsal valve,” their tips just about attaining the 
dorsal line, with the ovipositor often exserted from between them. Legs vary¬ 
ing from yellowish white to honey-yellow , the tarsal tips brown; honey- 
yellow to dull rufous 9) in the dark 9 9 all the femora and tibife often obfus- 
