4 ENTOMOLOGICAL NEWS. [Jan., '03 



abdominal segments 3 and 4 similar in size and shape, in 

 adnexa and virens 3 slightly constricted ; superior abdomi- 

 nal appendages long and narrow, longer in the 9 , without 

 teeth or hooks in either sex, and with only low keels. Seg- 

 ment 10 of $ without dorsal teeth. 



Type. Aeschna ingens Rambur. Insectes Nevropteres, p. 

 192, 1842. 



BIBLIOGRAPHY. 



I. Edm. de Sely-s Longchamps. Synopsis des Aeschnines. 

 Premiere partie : Classification. Bull, de 1'Acad. roy. de Belg. 

 3 me serie, tome V, 'No. 6 ; 1883, pp. 711-748. 



II. F. Karsch. Kritik des Systems der Aeschniden. Ento- 

 mologische Nachrichten. Jahrgang xvii (1891), No. 18, Seite 

 273-290. 



My original MS. describing this genus has undergone con- 

 siderable modification as the result of notes furnished me by 

 Dr. Calvert who has studied Aeschna adnexa and A. virens, 

 species not accessible to me which, he writes, belong to Cory- 

 phaeschna. With these notes as a basis the above characteriza- 

 tion of the proposed new genus has been broadened to include 

 the 3 species, ixigens, adnexa and virens. Future study of 

 other species will probably necessitate still farther modification 

 in this direction, the tendency being doubtless to include spe- 

 cific characters in a generic definition. Dr. Calvert has also 

 studied 4 <? and 3 9 of ingens, and I am indebted to him for 

 several suggestions embodied in the above description. Of A. 

 virens he has studied 9 front wings and 9 hind wings of males, 

 and 8 front wings and 8 hind wings of females : of adnc.va 7 

 front wings and 8 hind wings of males, and 7 front wings and 

 7 hind wings of females. 



as members of the proposed new genus. He has kindly placed this MS. 

 in my hands, and to it I am indebted for the ebove character. In one 

 wing of a 9 ingens from Florida there are 2 vertical rows of cells in the 

 anal loop. The supplemental loop is poorly defined in all the adnexa 

 wings studied by Dr. Calvert, and in i 9 of virens it consisted of 3 hori- 

 zontal rows. 



