480 Mr, P. Cameron on 
129. Surirella fastuosa, var. lata, W. Sm. Monterey, rare. 
[M.] 
150. Campylodiscus echeneis, Ehr. San Pedro, rare. [M.] 
131, Campylodiscus marginatus, C. Johnston *. Calif. guano. 
[Gv.] 
132, Campylodiscus stellatus, Grev.f Calif. guano. [Gv. | 
[To be continued. | & SY ya 
LX I.— Descriptions of Seventeen new Genera of Ichneumonidee 
Jrom India and One from Australia. By P. CAMERON. 
[Continued from p. 585.] 
MAGRETTIA, gen. nov, 
Head large, cubital, largely developed behind the eyes, 
which are large, parallel, ‘and distinctly distant from the 
base of the mandibles. Occiput not margined. Clypeus not 
distinctly separated, its apex margined, foveate laterally. 
Mandibles bidentate at the apex. Mesonotum not lobate. 
Scutellum flat, its sides stoutly carinate to near the apex, 
which is incised. Median segment with the basal area indi- 
cated ; its spiracles large, about four times longer than broad 
and placed near the base. Legs stout; the hinder coxe 
stout, not elongate; their lower inner side armed with a stout 
tooth; the claws simple. Areolet slightly oblique, triangular, 
the transverse cubital nervures uniting at the top; the re- 
current nervure with a short branch issuing from its middle. 
Petiole dilated at the apex, its spiracles placed near the apex, 
oblique, about three times longer than broad. Gastroceeli 
deep, narrowed, 
This genus has the petiole widely dilated at the apex, as it 
is in the Platyur?, the postpetiole being widely separated. 
Its distinctive features are the large head, well developed 
behind the eyes, the toothed hinder coxe, the stoutly keeled 
scutellum, incised at the apex, and the fapueibies with a long 
sharp apical tooth, and a blunt, short, hardly projecting sub- 
apical one. Characteristic is the pronotum, which is roundly 
incised near the apex; the mesonotum is broadly raised in 
front of the scutellar keels ; the supramedian area is distinctly 
defined, as is also the posterior median, the two lateral and 
* ¢Diatomeentafeln zusammengestellt fur einige Freunde,’ pl. xxvii. 
hg. 11, plexxex. fig. 2. 
fo. ee pl. sex, tee, 
