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XIl. On the Position of the Rhopalosomidae, with the 
Description of a Second Species. By Claude 
Morley, F.Z.S., F.E.S. 
[Read June 1st, 1910.] 
Plate L. 
Among the various boxes of Ichncnmonidae received by me 
in connection with the “ Fauna of India,” one from the 
Indian Museum at Calcutta and another from Colombo 
contained the sexes of an insect I entirely failed to place. 
Mr. Rowland Turner has, however, been so good as to point 
out to me its very close relationship with the anomalous 
genus lihopaloso7na, Cresson (Proc. Ent. Soc. Philad., iv, 
1865, p. 58, pi. v\ = Sibpllma, Westw., Trans. Ent. Soc. 
1868, p. 329). Though probably generically distinct there¬ 
from, it is so extremely unlike any other known Hymen- 
opteron that I am strongly averse to erecting a temporarily 
unnecessary genus for its reception ; and I shall, conse¬ 
quently, describe it as 
Rhopalosoma abnormis, sp. n. (Plate L, fig. 15.) 
An entirely testaceous species with only the flagellum and eyes 
black, the mandibles and anus infuscate. Head short but not abruptly 
constricted behind the internally subacutely einarginate eyes ; occiput 
abruptly declived, bordered below and not emarginate ; vertex neither 
broad nor punctate, laterally impressed behind the outer ocelli, which 
are prominent and enclose a triangular black mark, with the apical 
ocellus below the level of the upper orbits; frons convex and very 
obsoletely punctate, finely carinate longitudinally in the centre ; face 
extremely short, strongly transverse and obsoletely transaciculate ; 
clypeus obsoletely discreted, large, transverse and truncate at both 
extremities; labrum slightly exserted and broadly rounded, not 
trilobed, apically ; mandibles strong and subtridentate with a large 
black apical tooth, surmounted by one half its length and a third 
minute excrescence; palpi flavous and elongate. Antennae inserted 
at centre of eyes and hardly longer than half body, black and 
strongly attenuate throughout with the apically truncate and 
biarticulate scape alone pale; flagellum eleven-jointed in ten- 
jointed in 5, with the joints pilose, elongate, cylindrical, and the 
basal seven or eight each internally emitting two distinct setae from 
its apex ; terminal joint coriaceous, thrice longer than broad and 
TRANS. ENT. SOC. LOND. 1910.— PART IV. (DEC.) 
