:^(J6 H. A. HAGEN. 



flattened above, and a little dilated, tip truncate; fourth joint rudimentary, a 

 small tubercle; mask oblong, one-third longer than broad, channeled below, sides 

 bent up, base narrowed; middle third of front border straight, with longer comb 

 of flat scales; palpus just meeting, strong, dilated, very arcuate, dentated to base, 

 end hook long, sharp; movable hook long, bent, sharp ; wing cases reaching 4th 

 segment; abdomen stouter, less spindle sha])ed, more rounded above than below, 

 a little more than thrice longer than broad, the last four segments tapering; 9th 

 scarcely longer than 8th, half as broad on tip; last segment one-third of 9th; 

 lateral spines on 6th to 9th, the last as long as 10th segment; dorsal hooks on 8th 

 to 9th, short tubercles ; scars as usual, genitals marked ; appendages nearly twice 

 the length of 10th; triangular, less sharp, laterals one-third shorter; legs stout, 

 for burrowing, hind legs longer, exceeding 7th segment; third joint of posterior 

 tarsi as long as the two basal. 



Mr. Walsh stated the nympha would belong to one of four species, — 

 G. nofdtus, (imnicola, vastus, fraternus. The nympha of G. notatus 

 is now known, and I received these skins with the imago male and female 

 of G. vastus raised by Mr. Charles V. Riley. 



21. Gomphus pallidum (raised). 



Rambur. — Selys 4th Addit. Synops. Gomphin. p. 52, No. 1 ; Cabot, Mon. p. 2, 

 No. 2, pi. i, fig. 3 ( G. pilipes). 



One nympha skin, female, together with the just emerged imago from 

 Peoria, 111., June, 1878, by Prof. A. S. Forbes; two nymphse in alcohol 

 from Charleston, S. C, the types of Mr. Cabot ; one from Detroit, Mich., 

 June U, 1879, by Mr. H. G. Hubbard ; four young ones from Waltham, 

 Mass., by Mr. S. Henshaw ; a female nympha skin from Dallas. Texas, 

 in McLachlan s collection. Length 35 to 39 mm. ; breadth 10 mm. 



Body lancet shaped, very elongate, flat, without hairs except on limbs; head 

 cordate, flat, eyes large; vertex transverse-oblong, ocelli well marked; on each 

 side near the vertex a crescent furrow ending on the front angle of eye; two basal 

 joints of antenna globular, second smaller, third nearly twice as long as the two 

 basal ones, as thick as second, cylindrical, bent up a little, truncate on tip; fourth 

 rudimentary, a small roumled tubercle ; antenn?e and anterior border of head very 

 villous; occiput short, villous behind, very little notched behind in the middle, 

 and with another notch on each side near the hind angles, which are semi-globular 

 with some polished sear-like spots ; mask reaching forelegs, small, oblong, one- 

 half longer than broad, basal third a little narrowed; sides straight, bent up; 

 middle third of front margin produced in a short rounded lobe with comb of flat 

 scales and a prominent black tooth in middle; palpus short, just meeting, end 

 hook rounded externally, sharp, not longer than the six or seven teeth between 

 them and the base; movable hook long, bent, sharp ; prothorax narrower than 

 head, half as long as broad, hind part with three rqunded tubercles in the middle 

 and a larger one near the sides, somewhat painted outwards; wing cases covering 

 a little 4th segment; abdomen very flat, nearly thrice longer than broad, narrow- 

 ing after segment 4, sloping to the more contracted segments 9 and 10; segment 

 9 longer than 8, its apex half a broad as its base; 10th cylindrical, half as long as 

 9th. only 2 mm. broad; lateral spines very short on 7th and 8th, very long. 



