82 
The following brief statement of the characteristic features 
of the nymph is selected from Dr. Hagen’s description. 
Length, 19 to 24 mm. Body rather slender; median labial 
lobe very faintly rounded, lateral lobes ending in a strongly 
bent and pointed hook, with four strong teeth inside; abdomen 
tapering slowly after segment 6, segments as faras 8 of equal 
length, 9 a little longer than 8, 10 half as long as 9, cylindrical; 
lateral spines on 6 to 9, the last one third as long as 10; dorsal 
hooks very small, pointed on 6 to 9; appendages as long as last 
segment; third joint of hind tarsi scarcely longer than second. 
15. Gomphus cornutus Tough. 
G. cornutus Tough, (oo). 
This recently published species, readily recognized by the 
unusual form of the male abdominal appendages, was described 
from two males from DuPage county, taken May 30 and June 14. 
The Bolter Collection contains additional male and female ex- 
amples, but without data. 
16. Gomphus sp. (6). 
Gomphus sp., Hagen, ’85, p. 262, No. 14 (nymph). 
This interesting species, described by Hagen from three 
nymphs collected by Prof. Forbes at Cairo, Ill., July 26, is quite 
distinct from any other known to us. The following are the 
principal distinctions: 
Length, 18 to 23 mm. Body flat; lateral labial lobes with 
only two incisions near the strong and sharp apical hook, 
median lobe slightly rounded; side margins of abdomen very 
hairy, segment 9 as long as 8, 10 very short; lateral spines on 6 
to 9, the last less sharp, as long as 10; no trace of dorsal hooks; 
appendages as long as 9, broad; anterior tibial hooks short. 
17. Gomphus sp. (c). 
Gomphus sp., Hagen, '85, p. 263, No. 15 (nymph). 
A single nymph received from Newport, Ky., by Dr. Hagen 
is similar to the preceding, but was believed by him to be a 
distinct species, perhaps G. minutus. 
