REPORT OF THE STATE ENTOMOLOGIST 1908 Ta 
Appendix A 
STUDIES OF AQUATIC INSECTS: 
A PECULIAR NEW MAY FLY FROM SACANDAGA PARK 
BY JAMES G. NEEDHAM 
Among a small lot of neuropteroid insects sent me by Dr Felt 
for determination, was a new May fly with a remarkable develop- 
ment of the adbomen. Five of the abdominal segments have their 
flaring lateral margins expanded broadly, forming a wide parachute 
or aeroplane. This peculiarity has its parallel among known May 
flies only in the New Zealand species Oniscigaster wake- 
fieldi; a species that was described by McLachlan 36 years 
ago, and made the subject of a special report by him to the British 
Association for the Advancement of Science! and an announcement 
tc the Entomological Society of London,? and of two special 
papers.® The last paper gave full descriptions of both nymphal and 
adult* stages. Eaton’s Monographic Revision of Recent Ephemer- 
idae pages 224-26 gives a description of the adult insect, and adds 
[pl. 21, fig. 36] an excellent figure of the veriation. In Hutton’s 
list of New Zealand Neuroptera® is found another description of 
the adult. In 1899 Eaton® added two additional New Zealan+ 
species to the genus, O. intermedius, with considerably less 
dilatation of the lateral margins of the abdominal segments, and 
C.distans, with hardly any lateral expansion at all. So Eaton 
dropped from his characterization of the genus all mention of the 
onisciform abdomen, that had brought the type species into such 
prominent notice. In 1904 Hudson described the three species in 
kis New Zealand Neuroptera [p. 42-45] and added a much needed 
description of the nymph of O. distans [pl. 1, fig. 11; pl. 11, 
fig. 15], which appears to agree quite well with that of the typical 
species. 
The New York May fly about to be described exhibits a more 

1 Report of 1873, p. 118 (1874). 
2 Proceedings for 1874, Pp. Vi. ; 
3 Ent. Mo. Mag. 10:108—9, wood cut, 1873; Linn. Soc. Zool. Jour. 1874. 12:39-46, pl. 5, 
fig. 1-5. ; 
4 The figure of the adult is copied by Sharpe in volume 5 of the Cambridge Natural History. 
5 New Zeal. Inst. Trans. 1898. 31:218. 
6 Ent. Soc. Lond. Trans. p. 292-93, pl. ro, fig. 6a, 6), 6c. 
