AQUATIC INSECTS IN THE ADIRONDACKS 437 



cc Forks of the inferior abdominal appendage of the male ending bluntly, the 



obtuse angles bearing low teeth carolus. 



For the differential characters of other North American species, see 

 my paper " Ophiogomphus " in the Canadian entomologist^ 1899, 

 31:233-38, pi. 5. 



Ophiogomphus rupinsulensis Walsh 



1862 Erpetogomphus rupinsulensis Walsh, Acad. nat. sci. Phil. Proc. 

 p. 388 (original description) 



1890 Diastatomma rupinsulense Kirby, Cat. Neur. Odon. p. 61 (bibli- 

 ography) 



1892 Op hi ego mphu 8 rupinsulensis Banks, Am. ent. soc. Trans. 



19:351 (listed) 



1893 Ophiogomphus rupinsulensis Calvert, Am. ent. soe. Trans. 



20 : 242 (description) 



1894 Ophi ogom phus rupinsulensis Banks, Can. ent. 26:77 (listed 



from Ithaca) 



1895 Ophi ogomph us rupinsulensis Calvert, N. Y. ent. soc. Jour. 



3 : 44 (listed from Ithaca) 



1897 Ophi ogom phu s rupinsulensis Calvert, N. Y. ent. soc. Jour. 

 5 : 93 (listed from Schoharie) 



1897 Herpetogomphus pictus Needham, Can. ent. 29 : 181-82 (descrip- 

 tion) 



1899 Ophiogomphus rupinsulensis Needham, Can. ent. 31:236, pi. 

 5, fig. 3, 12, 21, 30 and 31 



1899 Ophi ogom phus rupinsulensis Kellicott, Odon. Ohio, p. 53-54 



(full description) 



1900 Oph i ogom phus rupinsulensis, Williamson, Dragon flies Ind. 



p. 298 (full description) 



This handsome, widely ranging species has been taken at several places 

 in the state. It was not met with at Saranac Inn. The nymph is 

 unknown. 



Ophiogomphus aspersus Morse 



1895 Ophi ogomphus aspersus Morse, Psyche, 7:209 (original de- 

 scription) 



1899 Ophiogomphus aspersus Needham, Can. ent. 31: 236, pi. 5, fig. 

 2, 11, 20 and 29 



This species, hitherto known from three somewhat immature specimens 

 in the Museum of comparative zoology, was common at Saranac Inn. 

 Many images of both sexes were observed flying over Little Clear creek 

 in the places where the shallow current rippled over sand. The males 

 would fly back and forth a few times and then rest for a time on some 

 prominent twig near shore, generally on the higher bank. They were not 

 difficult to approach or to capture when at rest. Except when oviposit- 



