468 NEW YORK STATE MUSEUM 



grown nymplis from Moline 111. Two imagos taken by Prof. R. H. 

 Pettit at Baldwinsville, Onondaga co., constitute the only record of the 

 species for this state. 



Nymph. (The largest I have before me, not grown, as shown by the 

 shortness of the wing cases.) Measures 24 mm; abdomen 16 mm; hind 

 femur 4 mm ; width of head 5.5 mm, of abdomen 6 mm. 



Color blackish, labium and tarsi yellowish ; body rough granulate, but 

 not hairy, with paired tubercles obtuse above the base of the antennae, 

 and on the middle of the vertex, and on the middle of the superolateral 

 ridge that extends from the rear of the eyes to the hind angles of the 

 head; a pair also on the superolateral angles of the prothorax; and the 

 usual two pairs above the bases of the coxae, the anterior a httle longer 

 and stouter, but both directed anteriorly ; three or four pairs above the 

 middle and hind coxae, running down into a ridge which extends on 

 these coxae; a dorsal, tuberculate, superior ridge on all the femora; 

 dorsal hooks represented on all the segments of the abdomen, becoming 

 prominent and pointed on segments 6-9; lateral spines on segments 5-9, 

 increasing in length posteriorly, those of the ninth segment, two thirds as 

 long as the loth segment; appendages more than twice as long as the 

 loth segment, superior and inferiors of equal length, laterals one 

 fourth to one fifth as long as the others, superior, obtuse at tip, inferiors 

 finely denticulate exteriorly. 



Head considerably narrowed behind the eyes, and with a deep, quad- 

 rangular excavation of the hind margin ; eyes with a very long anterior 

 border, and a long pointed hind angle lying on the vertex; labium with 

 the cleft of the median lobe somewhat v-shaped, not closed; lateral lobe 

 truncate on apex, with about 18 denticles on inner margin. 



EPIAESCHNA 



There is a single North American species. 



Epiaeschna heros Fabricius 



1798 Aeshna heros Fabricius, Eut. syst. Suppl. p. 285 



1839 Aeshna multicincta Say, Acad. nat. sci. Phil. Jour. 8 : 9 



1861 Aeschna heros Hagen, Synopsis Neur. N. Am. p. 128 



1869 Aeschna heros Harris, Ent. correspondence, p. 326 (notes) 



1862 Aeschna her os Walsh, Acad. nat. sci. Phil. Proc. p. 397 (notes) 



1875 Aeschna heros Hagen, Bost. soc. nat. hist. Proc. 18 : 36 (bibliography 

 and distribution) 



1881 Ej)iaeschua heros (uympb) Cabot, Mus. comp. zool., Mem. 8:30, 

 39, pi. 1, fig. 3 



1893 Epiaeschna heros Calvert, Am. ent. soc. Trans. 20 : 246-47 (de- 

 scription) 



1895-97 Epiaeschna heros Calvert, N. Y. ent. soc. Jour. 345 ; 5 : 93 

 (listed from Dobbs Ferry, New York, Itbaca, Albany and Buffalo) 



1899 Epiaeschna heros KeJlicott, Odon. Ohio, p. 81 (description) 



1900 Epiaeschna heros Williamson, Dragou flies Ind. p. 302 (descrip- 



tion) 



This, our largest dragon fly, is widely distributed throughout the state, 

 and, for that matter, throughout the whole eastern United States. Its 



