THE CRANE-FLIES OF NEW YORK PART II 985 



States as " weavers." They frequent rather shady places and have 

 a remarkable dance over three or four feet of vertical space, whence the 

 name " king of the dancing tipulids " given them by Johnson. This 

 species is the only one whose immature stages are at all known. 



Brachypremna dispellens (Walk.) 



1860 Tipula dispellens Walk. Trans. Ent. Soc. London, n. ser., vol. 5, p. 333-334. 

 1886 Brachypremna dispellens O. S. Berl. Ent. Ztschr., vol. 30, p. 162. 



Brachypremna dispellens is the most widely distributed species of the 

 genus. It ranges from New Jersey southward thru North America, and 

 thru South America as far as Argentina. A larva found by R. C. Shannon 

 in a rotten log by a stream near Washington, D. C., on April 23, 1913, 

 was placed in rearing and emerged in May as an adult male of this species. 

 The badly mutilated pupal skin was preserved and is here described. 

 No part of the larva was preserved. 



Pupa. Length of cast pupal skin, about 18 mm. 



Coloration brownish yellow; abdomen with a broad brown sublateral stripe on both ventral 

 and dorsal segments; each of pleural spines set in a brown spot. 



Head small. Antennal spines very large and crowded at base, soon passing into the short, 

 slender flagellum. Labrum (Plate LXXXVII, 474) blunt. Labial lobes closely approximated, 

 so as to appear as a single large, transversely rectangular lobe at end of labrum. Sheaths 

 of maxillary palpi short, not recurved at tip. Pronotal breathing horn (Plate LXXXVII, 475) 

 small, slender, curved, ringed with fine annuli, tapering gradually to the small apex; margin 

 of apex set with breathing pores. Mesonotum with eight conspicuous, blunt, naked tubercles; 

 the four intermediate tubercles larger, arranged in the form of a trapezoid; anterior median 

 pair high, conical, located rather close to mid-dorsal line. Wing sheaths reaching end of 

 second abdominal segment. Leg sheaths (Plate LXXXVII, 476) extending beyond mid- 

 length of fourth abdominal segment; fore legs very short, ending opposite base of third 

 tarsal segment of other legs. 



Abdominal tergite 1 with a pair of long, slender spines before posterior margin; segments 2 

 to 7 subdivided into a basal and a posterior ring, the latter with a transverse row of four long, 

 slender spines before posterior margin, the seventh tergite with about six such spines; sternites 

 similar, with four spines on posterior ring; pleurites with a slender spine on basal and posterior 

 ring; at base of posterior ring between spines, an indistinct, slightly protuberant spiracle. 

 Male cauda (Plate LXXXVII, 477) narrowed, small, valves blunt; on dorsal side near base 

 four conspicuous lobes, each terminating in a slender, chitinized spine; a small acute spine on 

 sides of ninth segment at base. 



Neanotype. Cast pupal skin, Washington, D. C., May, 1913 (in collection of United 

 States National Museum). 



