NORTH AMERICAN NEUROPTERA. 279 



more oblong abdomen, the shortness of legs, which are real burrowing 

 legs with a strong apical hook of tibiae, wanting by Hagenius. 



The nymphae from Kentucky have antennae of Hagenius, mask and 

 palpus of H. nanus, legs of the same, but the distance of the two ante- 

 rior pairs equal, abdomen of Gromphus with ventral sutures and last 

 segment of //. nanus. The discovery of the imago is very desirable, to 

 fix the position of the nympha. 



36. Hagenius brevistyliis (raised). 



Selys Monogr. Goinphin. p. 241 ; Cabot p. 9, No. 12, pi. iii, fig. 4. 



I have seen a large number of nymphae, very young till full grown, 

 dry or in alcohol, and several nymphae skins. A dozen is still before me 

 from Orono, Me., Massachusetts, New York, Kentucky, Kansas, male 

 and female. The species was raised by T. W. Harris ; one nympha with 

 the imago half out was presented to the collection by Prof. Fernald ; 

 similar ones by other students. Length 12 to 40 mm. 



Body very flat, about circular, not hairy ; head large, flat, cordate, as broad as 

 long; between the an tenure a narrow projection, with rectangular notch on tip 

 and sharp angles, inserted in which is a cordate tubercle; eyes a little before the 

 hind part of head, moderately large, rather conical; side part of head below and 

 before the front angle of the eyes protracted near the mouth in a triangular lobe; 

 vertex flat, ocelli visible, small, near each of the hind ones a larger elongate flat 

 spot, and two smaller ones before the anterior ocellus ; occiput short, but large, 

 separated from the forehead by a suture uniting the sharp inner angles of the 

 eyes and the well marked posterior margin of eyes ; hind border of occiput straight, 

 a little notched in middle, median suture well marked, on each side a small conical 

 tubercle; lateral hind angles pyramidal, strongly elevated ; antennae short, the 

 two basal joints cylindrical, first once broader than long, the second merely an- 

 nular ; third joint a large flat disc, circular, three times broader than the first, the 

 inner edge cut straight, border somewhat elevated ; fourth joint rudimentary, 

 represented by a very small black spine in the swollen anterior border of third 

 not far from the apical angle ; the third joint is covered, less below, with short 

 flat scales, longer on the inner border; similar scales cover the basal joints, more 

 or less the head, occiput and prothorax; mask square, sides bent up, base a little 

 narrowed; front border slightly convex, middle third a little more produced, with 

 pavement teeth ; above with a short but thick comb of flat scales ; palpus short, a 

 flat broad lobe, rounded on tip, finely serrated within : movable hook longer, ar- 

 cuate, sharp ; prothorax narrower than head, excavated, more than twice as broad 

 as long, straight before, a little rounded behind, sides bent up ; a transversal suture 

 separates the front part; wing cases reaching 0th segment; abdomen very large, 

 exceedingly flat (4 mm. high by 25 mm. longj, more than twice broader than 

 head, nearly circular on young and half grown specimens, a little longer than 

 broad (23 mm. long ; 20 mm. broad) on full grown ; the first three segments taper- 

 ing to base, the three last to tip; segments 1 and 2 very short, 3 to 9 nearly equal 

 (2.5 mm. long; 20 mm. broad), 10th very short, inserted entirely in a quadran- 

 gular excision of 9th ; the outer edges of segments 2 to 9, which are in fact the 

 lateral spines, form a sharp-edged border, separated from the abdomen by a ven- 



