THE CRANE-FLIES OF NEW YORK PART II 1009 



reduced in size, the median pair represented only by two blunt brown tubercles; eighth 

 segment with the usual six strong ventral and lateral lobes. Female ovipositor with valves 

 small; sternal valves short and broad, much shorter than tergal valves. 



Nepionotype. Stanford University, California, April 15, 1915. 

 Neanotype. With type, bred April 15, 1915. 

 Paratypes. Numerous larvae and pupae with type. 



Tipula trivittata Say 



1823 Tipula trivittata Say. Journ. Acad. Nat. Sci. Phila., vol. 3, p. 26. 



The larvae and the pupae of Tipula trivittata live beneath the bark of 

 much-decayed prostrate trunks or under the layers of moss that often 

 cover fallen trees. Abundant larvae were found on March 22, 1913, and 

 were placed in rearing, adults emerging on April 26. On April 16, 1914, 

 larvae of two distinct sizes some very small and some nearly fully grown 

 occurred in abundance beneath moss (Entodon seductrix [Hedw.] C. 

 MuelL, Brachythecium acuminatum [Hedw.] Kindb,, Hypnum Haldan- 

 ianum Grev., and Mnium sylvaticum Lindb.) on prostrate decaying elms, 

 sycamores, and other trees, at Renwick Park, Ithaca, New York. 



The adult flies are among the commonest of the eastern specjes of 

 Tipula, and fly during a large part of the season. 



Larva. Length, 24-25 mm. 

 Diameter, 2.7-3 mm. 



Coloration pale brownish yellow, a little paler beneath. 



Form moderately elongated, terete. Pubescence very short or practically lacking. Setae 

 on anterior segments strong, on posterior segments shorter. Chaetotaxy as follows: ter- 

 gites with a posterior row of six setae, the two middle punctures each with a single seta, 

 the two lateral punctures each with two setae; pleurites with a single seta on each ring; 

 sternites with two rows of setae, the anterior row consisting of two closely approximated 

 groups of two setae each, the posterior row consisting of a single large seta, laterad of which 

 is a minute bristle. Spiracular disk (Plate XCV, 529) surrounded by six lobes; lateral pair 

 long and slender; dorsal pair a little shorter, slender; ventral lobes blunt; ventral lobes with 

 a jet-black mark on inner face; lateral lobes with dark markings represented only by a very 

 small linear dash; dorsal lobes with a small black area. Spiracles large, separated by a dis- 

 tance a little less than diameter of one. Anal gills indistinctly lobed, four in number, two 

 on either side, very blunt and protuberant. 



Head capsule as in genus, the mouth parts almost as in T. usitata. Mentum broad, with 

 seven teeth. Hypopharynx with five teeth, the three middle ones the longest, subequal 

 in size. Antenna shorter and stouter than is usual in the genus. 



Pupa. Length, 19-20 mm. 



Width, d.-s., 2.5-2.6 mm. 

 Depth, d.-v., 2.8-3 mm. 



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