460 NEW YORK STATE MUSEUM 



Dorsal hooks of abdomen represented only by minute backward pro- 

 longations of the median ridge on all the segments; lateral spines on 

 segments 7-9, increasing in size posteriorly, small, on the ninth segment 

 much shorter than the loth segment, against which they are closely ap- 

 pressed; loth segment two thirds as long as the eighth, and a little less 

 than half as long as the ninth. 



Labium with its median lobe distinctly convex anteriorly, and with a 

 brown tooth in the middle in the midst of the usual flat, fringing hairs ; 

 lateral lobe regularly arcuate, with about nine coarse, trapezoidal, ser- 

 rately recurved teeth on its inner margin. 



A goodly number of specimens of the nymphs were collected from Little 



Clear creek on the hatchery grounds, Little Clear pond near its outlet, 



and from Bone pond. 



Gomphus villosipes Selys 



1854 Gomphus villosipes Selys, Acad. Belg. (2) Bui. 21 : 53 

 1861 Gomphus villosipes Hagen, Synopsis Neur. N. Am. j). 105 

 1890 Aeshna villosipes Kirby, Cat. Neur. Odon. p. 64 (bibliography) 



1893 Gomphus villosipes Calvert, Am. eut. soc. Trans. 20:244-45 (de- 



scription) 



1894 Gomphus villosipes Banks, Can. ent. 26: 77 (listed from Ithaca) 



1895 Gomphus villosipes Calvert, N. Y. ent. soc. Jour. 3 :45 (listed from 



Ithaca) 

 1897 Gomphus villosipes Van Duzee, N. Y. ent. soc. Jour. 5 ; 89 (listed 



from Grand Island) 

 1897 Gomphus villosipes Calvert, N. Y. ent. soc. Jour. 5 : 93 (listed 



from Grand Island) 

 1897 Gomphus villosipes Needham, Can. ent. 29: 166 (note on rearing 



the nymph at Ithaca) 



1899 Gomphus villosipes Kellicott, Odon. Ohio, p. 63 (description and 



figure) 



1900 Gomphus villosipes Williamson, Dragon flies Ind. p. 291 



This is an exceedingly common species at Ithaca, where I have picked 

 up thousands of the exuviae at a time along the borders of the Cascade 

 pond in June. The imagos fly about or rest on the snags and pro- 

 jecting rocks, which are common in the turbulent creeks about Ithaca. 

 The nymphs burrow in the bottom in shallow water, seeming to prefer 

 banks of somewhat clayey mud. They are slow moving, stiffly sprawl- 

 ing creatures, powerful, rapacious, and seemingly the dominant animals 

 in the bottom mire. 



Nymph. Total length 35 mm; abdomen 23 mm; hind femur 

 7.5 mm ; width of head 6 mm, of abdomen 8.5 mm. 



Body depressed, with legs wide apart and very sprawhng ; abdomen 

 lanceolate, pointed, rapidly narrowed beyond the fifth to the base of the 

 ninth segment, more slowly narrowed thereafter. The whole body and 

 all appendages, clothed with a dense scurfy pubescence, which is con- 

 spicuously marked with bare lines or "scars." 



