1909.] J. G. Needham : Notes on the Neuroptera. 187 



carina, beneath which is a conspicuous round callosity or tubercle, 

 directed posteriorly. On the sloping sides of the apical margin of 

 the ninth segment is another low carina which is decurrent at its 

 junction with the, posterior rim just described. The tenth segment 

 is narrow and is mostly included. A pair of hooks arise from the 

 inner side of the setae, curving dorsally and then forward, with 

 their tips opposed to the bifid dorsal process of the ninth segment 

 (pi., xix, figs. 2, 3 and 4)- . 



This is the largest species in the collection, and it is doubtless 

 in life a rather handsome insect. It combines characters of the 

 American genus Acroneuria with those of Perla, and will doubtless 

 eventually be removed to a new genus. 



Perla ione, sp. nov. 



Eight males and five females. Kulu, W. Himalayas (Reg. 

 Nos. - V^-, '^V--, -¥--, ~'V--), also one of more recent collection by 

 Dr. Annandale from Kurseong, probably of the same species, 

 although the sides of the prothorax appear to be more convergent 

 behind and the spot on the top of the head is more extensive. A 

 specimen labelled Kurseong, E. Himalayas (Reg. No. -f|-), also 

 appears to be the same. 



An obscure brownish species, with scanty and indistinct mark- 

 ings. IvCngth of male 11 to 15 mm., antennae 8 mm. and setse 5 to 

 6 mm. additional, and expanse of wings 33 — 35 mm. Length of 

 female 15 mm, and expanse of wings 43 — 45 mm. 



Head yellowish, with a diffuse fuscous spot between the ocelli 

 (in the unnumbered specimen mentioned above, overspreading the 

 ocelli in an obscure quadrate path). Antennse fuscous. Body 

 nearly uniform brownish. Legs yellowish brown, somewhat darker 

 on the knees and tarsi. Wings subhy aline, with veins obscurely 

 fuscous. Setae yellowish. 



The ninth abdominal segment is extended beneath posteriorly 

 in a long scoop-shaped prolongation, which covers only the lower 

 third of the end of the abdomen. Externally it is regularly 

 convex and smooth without callosity, but with a more or less 

 thickened rim across the upturned margin. The tenth segment is 

 included below, but exposed and bifid above, divided into two high 

 prominences, that are at first erect and then suddenly bent forward, 

 ending in obtuse points, parallel and closel}^ approximated (pi. xix, 

 fig. 5). The eighth ventral abdominal segment in the female is pro- 

 longed posteriorly on the ventral side in an obtusely triangular flap 

 nearly as wide as the abdomen. 



This is the most abundantly represented species in the collec- 

 tion, and it is a typical Perla. 



The eggs of this species as they appear when removed from 

 the ovary are roundish oval with a revolute strongly chitinized 

 collar at the micropylar end : the margins of the collar are lobed 

 and fimbriate (pi. xix, figs. 6 and 7). The surface of the shell is 

 pitted all over with little round shallow depressions. 



