982 CHARLES PAUL ALEXANDER 



are directed straight outward and finally downward. The eighth segment 

 has a circle of four dorsal, four ventral, and two pleural spines, which 

 are finely bifid at their tips. The pupa is green, as is the larva, with similar 

 angular dorsal stripes. 



This is the only tipuline larva known to the writer with five lobes sur- 

 rounding the spiracular disk. This feature is the more remarkable when 

 this larva is compared with that of Oropeza, apparently closely related 

 but with a normal tipuline appearance. The immature stages of other 

 species of Dolichopeza and related genera will be of interest. 



The resting positions of Dolichopeza are described on page 713 of this 

 paper, and the striking dissimilarities to Oropeza noted. It may be that 

 Oropeza is not so close to Dolichopeza as has been believed. Osten Sacken 

 (1886:157) describes the mating of a European Dolichopeza, presumably 

 D. albipes, as follows: 



I had occasion to observe the copula (in Heidelberg, July 26) ; the female was hanging down 

 from some support to which it held on by its front legs; it bore the whole weight of the male, 

 who was fastened to it merely by the forceps, hanging head downwards, with his legs stretched 

 out. I have seen Bittacomorpha copulate in the same manner. 



Genus Oropeza Needham (Gr. mountain + feet) 



1908 Oropeza Needm. 23d Kept. N. Y. State Ent. (1907), p. 211. 



Larva. Form somewhat depressed. A strong tubercle on sides of body before spiracular 

 disk. Spiracular disk surrounded by six lobes, the four dorsal ones slender, the ventral 

 pair blunt. Anal gills blunt. Head capsule of the tipuline type. Mandible blunt, with about 

 seven teeth. Hypopharynx five-toothed. Mentum seven-toothed. Coloration dark green. 



Pupa. Pronotal breathing horns elongate-cylindrical, slender. Mesonotum with a 

 slightly elevated triangular area on either side of mid-dorsal line. Leg sheaths ending about 

 on a level, or fore legs a little longer. Abdominal segments with two stout pleural spines; 

 posterior annul! before margin with a transverse row of twelve or fewer spines. 



Oropeza is a genus of crane-flies including ten described species, all 

 of which occur in eastern North America with the exception of three 

 Japanese forms. The flies are common beneath dark culverts and bridges, 

 in outhouses, in crannies and crevices of rocky cliffs, beneath overhanging 

 boulders along mountain streams, and in similar situations. The resting 

 positions of the adult flies are discussed on page 712. Many species show 

 a notable predilection for resting on spiders' webs. The immature stages 

 of Oropeza obscura are spent in dry moss, as discussed below. Other 

 species have been reared in sandy soil and in wet moss. 



