NORTH AMERICAN NEUROPTERA. 283 



these longitudinal sutures there are in all Gomphina transversal ones in- 

 dicating the end of the segments. Now Ictinus has an oblique addi- 

 tional suture on each side of segments 7 and 8 in the lateral space of the 

 venter. This suture begins on the lateral edge on the base of the lateral 

 spine (a little before the end of the segment) and runs to the middle of 

 the lateral space of the foregoing segment, forming a triangular addi- 

 tional part. It would be easy to accept this additional part as the indi- 

 cation of the large lateral leaf on the imago, but this leaf occurs only 

 on the 8th segment, besides that the additional suture is wanting in other 

 Gomphina with lateral leaves. On segments 3 to 6 the additional trian- 

 gular part is inflated with an impressed rim below, ending just where the 

 ventral bags are situated, but here no suture is visible, and the ventral 

 bags are (in one specimen) visible only on 4 to 6 ; similar impressions 

 are on the sides of abdomen of Aphylla. The head is large, and has 

 between the antennse a flat projection as Hage.nius ; the under side of 

 head is projected below the eyes, so as to be seen from above, and simi- 

 larly projected near the mouth parts ; the occiput ig large and separated 

 from the front by a suture ; antennae with third joint thinner than second, 

 cylindrical, a little flattened above ; mask large, sparse, middle third more 

 or less produced with teeth and comb ; palpus short, broad, hooked, inside 

 with teeth ; movable hook not very long ; prothorax saddle shaped, 

 stigmata not covered ; abdomen strongly roof shaped, with a crest of 

 dorsal hooks and sharp lateral spines ; apical margin of segments 7 to 8 

 notched ; last segment inserted in 9th ; hind legs longer than body, front 

 legs fit for burrowing ; base of legs successively wider distant ; prothorax 

 stigma free. 



After all, Ictinus forms a group well characterized and difierent from 

 all others. 



40. Ictinus praecox (supposition). 



Cabot p. 11, pi. 1, fig. 4. 



Five nymphffi, not entirely full grown and younger ones, all females 

 from the Sutledge River, middle Himalaya, and one from East Jumna 

 out of holy tank, near Delhi, in alcohol,- by Rev. M. M. Carleton. 

 Length 21 to IG mm. ; breadth 12 to 8 mm. 



Body short, stout, roof shaped, similar to Hagenius, about circular; head large, 

 cordate, divided by a straight transversal suture behind the eyes, which are mod- 

 erately large, triangular, rather prominent; between the antennse a small square 

 projection, with rectangular notch on tip and sharp angles, inserted in which is a 

 short transversal tubercle; ocelli visible: occiput behind the transversal suture 

 about as long as the front part, hind border, nearly straight, angles blunt, well 

 rounded; head beneath at each side with a small prominent tubercle below the 



