AQUATIC INSECTS IN THE ADIRONDACKS 461 



Abdomen with obtuse, continuous middorsal ridge, showing no trace 

 of dorsal hooks ; lateral spines very small, closely appressed, and incon- 

 spicuous, present only on segments 8 and 9, on 8 very short, on 9 

 longer, but closely applied to the sides of segment 10. The loth segment 

 is hardly shorter than the eighth, but it is less than half as long as the 

 ninth. 



The mentum of the labium is distinctly produced and rounded on its 

 front border, with a median brown tooth in the midst of the fringing flat 

 hairs. The lateral lobe is broad and strongly arched, with about six 

 coarsely serrate teeth on its inner margin. 



Gomphus furcifer Hagen 

 1878 Gomphus furcifer Hagen, Acad. Belg. (2) Bui. 46 : 458 



1899 Gomphus furcifer Kellicott, Oclon. Ohio, p. 64 (description and figure) 



1900 Gomphus furcifer Williamson, Dragon flies Ind. p. 292 (description 



and figure) 



This species has not hitherto been recorded from New York state, and 

 I have not seen it there at large ; but there is a specimen bearing an 

 Ithaca label in the Cornell university collection. The nymph is unknown. 



DROMOGOMPHUS 



A single species of this genus belongs to the Ne\y York fauna. 

 Dromogomphus spinosus Selys 



1854 Gomphus spinosus Selys, Acad. Belg. (2) Bui. 21 : 59 



1861 Gomphus spinosus Hagen, Synopsis Neur. N. Am. p. 102 



1862 Gomphus spinosus Walsh, Acad. nat. sci. Phil. Proc. p. 391 (note) 



1863 Gomphus spinosus Hagen, Stett. ent. zeit. 24:373 



1873 Gomphus spinosus Hagen, Bost. soc. nat. hist. Proc. 16:359 

 1875 Gomphus spinosus Hagen, Bost. soc. nat. hist. Proc. 18 : 44 (bibli- 

 ography) 



1893 Dromogomphus spinosus Calvert, Am. ent. soc. Trans. 20 : 245 



(description) 



1894 D r o m ogo m ph us s p i n o s u s Banks, Can. ent. 26 : 77 (listed from 



Ithaca and Baldwinsville) 



1895 Dromogomphus spinosus Calvert, N. Y. ent. soc. Jour. 3:45 



(listed from Ithaca and Baldwinsville) 

 1897 Dromogomphus spinosus Calvert, N. Y. ent. soc. Jour. 5 : 93 



(listed from Earner) 

 1897 Dromogomphus spinosus Needham, Can. ent. 29 : 186 (characters 



of the nymph) 



1899 Dromogomphus spinosus Kellicott, Odon. Ohio, p. 71 (description) 



1900 Dromogomphus spinosus Williamson, Dragon flies Ind. p. 296 



(description) 

 This species has been taken sparingly and in a few places within the 

 state, but it is probable that it frequents the borders of most of the larger 



