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THE ENTOMOLOGIST 
Vou. XLVII.] MAY, 1914. (No. 612 
A MONOGRAPH OF THE GENUS JOPPIDIUM, Watusu. 
Family Ichneumonipz: Subfamily Cryerinm: Tribe CRYPTIDES. 
By CraupE Mortey, F.Z.S. 
“THE species of this genus are slender in form, especially 
that of the male, the legs slender, the posterior pair unusually 
long; the antenne of the female often thickened before the 
apex, somewhat as in Joppa; the wings ample, and in the 
Mexican species, so far as known, entirely blackish; the abdomen 
more slender than in Cryptus, the first segment being long and 
linear,” says Cresson, who places them between Cryptus and 
Phygadeuon in 1873. As a matter of fact, it is extremely similar 
to Acroricnus in its produced mouth, and I fail to discover any 
pertinent structural distinction ; if it be thought expedient to 
preserve Walsh’s genus, its invariably infumate Wings and 
western range will serve as sufficient characters. The American 
species are easily distinguished, and quite distinct inter se. But 
little synonymy has hitherto arisen. 
A detailed and fairly good description of the genus is given, 
with an excellent figure of the front wing of Ichneumon sp. for 
comparison, by Walsh in his erection (Trans. Acad. Sc. St. 
Louis, iii. 1878, p. 69) ; but the author obviously had no idea of 
its systematic position, for he compares it with such diverse 
things as Baryceros, Joppa, Helwigia and Euceros, with none of 
which it is at all closely connected. 
From the somewhat irregular method of sexual erection of 
his genus Joppoceras by Ashmead (Proc. Nat. Mus. U.S. 1900, 
pp. 39-40), one is led to suppose it founded upon a new and 
hitherto unpublished species, named in M8. dubiosuwm by Cresson, 
differing from the type of Joppidiwm—there misprinted rajficeps, 
Walsh—solely in having the metathorax both strongly striate 
and bicarinate in place of unitranscarinate, as in the latter ; for 
in both the metathoracic spiracles are elongate with wings black 
or infuscate, and areolet both large and parallel-sided. As a 
matter of fact, I believe he simply wished to split off the second 
of the following species into a new genus, certainly upon 
insufficient characters. 
ENTOM.—may, 1914. M 
