THE CRANE-FLIES OF NEW YORK PART II 993 



Genus Aeshnasoma Johnson (Gr. a dragon fly + body) 



1909 Aeshnasoma Johns. Proc. Boat. Soc. Nat. Hist., vol. 34, p. 115-116. 



Aeshnasoma is a monotypic genus found in northeastern North America. 

 It is unquestionably close to Longurio and may be congenerous with it. 

 The type, Aeshnasoma rivertonensis Johns., is apparently very local in 

 its distribution. 



Johnson (1906 : 1-2) described an unknown tipuline larva which undoubt- 

 edly pertains to this species. The larva was found on June 10, 1900, 

 in a cold spring at Riverton, New Jersey. It was brought into the labora- 

 tory but could not be reared, the change from the cold spring (about 

 60 F.) to warmer waters being fatal. The larva when fully extended 

 measured about 45 millimeters in length. It was yellowish white in 

 color and was translucent, the alimentary canal with its contents being 

 clearly visible thru the thin skin. Johnson describes and figures the 

 peculiar branched anal gills (Plate LXXXIX, 492) of this genus. The 

 larva was doubtfully referred to Longurio, the adults of Aeshnasoma 

 being undescribed at that time. 



In a later paper (1907-12 [1909] : 115-116) Johnson mentions the taking 

 of several more larvae in 1902, and, on July 20, the capture of the adult flies 

 on which the genus and species are based. 



The only larva that was preserved was kindly sent to the writer for 

 study by Mr. Johnson. It is undoubtedly very close to Longurio, both 

 genera showing the same peculiar spiracular disk and the branched anal 

 gills, a condition that is found nowhere else in the Tipulidae so far as is 

 known to the writer. 



Genus Holorusia Loew (derivation obscure) 



1863 Holorusia Loew. Berl. Ent. Ztschr., vol. 7, p. 1. 



Larva. Spiracular disk surrounded by six moderately elongate lobes fringed with long 

 hairs; inner face of lateral and ventral lobes with capillary black lines; disk between spiracles 

 dusky. Anal gills six. Mandible small, with a single dorsal and ventral tooth in addition 

 to apical point. Antenna with a conical apical papilla. Mentum seven-toothed. Hypo- 

 pharynx six-toothed. 



Pupa. Sheaths of maxillary palpi recurved at tips. Pronotal breathing horns rather 

 short and stout, the long apices flattened. Armature of abdominal segments almost as in 

 Prionocera, but the posterior rows of spines more numerous (fourteen to twenty-four); 

 pleurites with three spines, the two on posterior ring situated one behind the other. Cauda 

 with six stout dorsal lobes. 



