454 NEW YORK STATE MUSEUM 



R The variety differs from the typical d e s c r i p t u s, so far as observed, 

 only in the form of the appendages of the male abdomen. These 

 differences are shown in the accompanying figures, wherein it will be seen 

 there is a radical difference in the form of the anterior hamule of the 

 male, and that in the variety the superior appendage is shorter, less acute 

 at apex and with the inferior tooth directed more inward than in the typical 

 descriptus. 



The variety was first received from Franconia N. H. among some 

 specimens sent me by Mrs Annie Trumbull Slosson. It was not 

 uncommon about Saranac Inn. A few were observed foraging about the 

 Otisville road, and a few others were seen resting on the bare sand of 

 the railroad embankment at the outlet of Little Clear pond. Oviposi- 

 tion was not observed. 



Nymph. (PI. i8, fig. 4) Total length 32 mm; abdomen 20 mm ; hind 

 femur 5.6 mm; width of head 5 mm, of abdomen 7 mm. 



Body depressed, lanceolate, hairy on all lateral margins, tapering 

 beyond the middle of the rather pointed abdomen. Colors generally 

 entirely obscured by adherent dirt, but after molting there is often seen 

 a darker band across the base of each abdominal segment. 



Third segment of the antenna depressed and somewhat widened api- 

 cally. 



Labium with the mentum one third longer than wide; median lobe 

 nearly straight on its front border, fringed with flat hairs, but unarmed ; 

 lateral lobe regularly incurved with a long terminal hook, exceeding the 

 six to eight teeth before it on the inner margin. 



Lateral spines on abdominal segments 6-9, sometimes obscured by 

 tufts of hairs on the sixth segment, those of the ninth segment short, 

 hardly surpassing the base of the loth segment, straight, but not closely 

 appressed. loth segment half as long as the ninth, and a little shorter 

 than the appendages; lateral appendages a sixth to a seventh shorter 

 than the others. Dorsal hooks represented by low, inconspicuous rudi- 

 ments on segments 3-9, with traces of the median impressed line on the 

 anterior end of the middle segments. 



Nymphs of this species were taken at two places : Colby pond, just 

 west of the town of Saranac Lake, and Bone pond. They were associ- 

 ated with and greatly outnumbered by G. s p i c a t u s in both places. 



Gomphus sordidus Hagen 



1854 Gomphus sordidus Hageu, Acad. Belg. (2) Bal. 21 : 54 

 1861 Gomphus sordidus Hagen, Synopsis Neur. N. Am. p. 106 

 1875 Gomphus lividus Hagen, Bost. soc. nat. hist. Proc. 18 : 45 (listed) 

 189.3 Gomphus miuutus Calvert, Am. ent. soc. Trans. 20 : 244 ( 5 only) 

 1899 Gomplius lividus Kellicott, Odon. Ohio, p. 66 (description and 

 figures) 



