No. 64] DIPTERA or CONNECTICUT : TAXONOMY 247 



T. {Arctotifula) dickinsoni Alex. (Fig. 27, F). 

 1932. Tipula dickinsoni Alexander ; Bull. Publ. ]Mus. Milwaukee, 8 : 

 240-242. 



Figs. — Ibid., p. 251, figs. 197 (wing, hyp.), by Dickinson. 



Nasus elongate. x\.ntennal flagelliim with basal segments bi- 

 colorous, black, the basal enlargements dull yellow, the outer seg- 

 ments uniformly blackened. General coloration of notum brown; 

 praescutum with darker brow-n stripes, the lateral pair more or less 

 obsolete; pleura and coxae blue-gray. Vestiture of body relatively 

 short and inconspicuous, lacking on sternopleurite. Hypopygium 

 with tergite (Fig. 27, F). $. L. 12-13 mm.; w^ 12.5-13 mm.; an- 

 tenna, 4.5-4.8 mm. 5. L. 13-13.5 mm.; w. 11-11.5 mm. 



(Late May) Mich., in grass-sedge-cattail marshes; Wise, in tamarack bog. (Cana- 

 dian). 



T. (Arcfofrpula) piliceps Alex. 



1915. Tipula piliceps Alexander; Proc. Acad. Xat. Sci. Philadelphia, 



1915 : 482-484. 



Fig. — Alexander, Ibid., pi. 21, fig. 85 (ovipos.). 



The essential characters are given in the key. ? . L. 14.5 mm. ; 

 w. 16 mm. 



Subarctic North America. 



Subgenus Yamatotipula Matsumura 



1916. Yamatotipula Matsumura; Thousand Ins. Japan, Add. 2:461- 



462. 



Bs long, nearly if not quite twice m-cu, in extreme cases even 

 longer; tti-cu usually close to base of cell 1st Mo, M^+a being short to 

 very short; second section of i)/i + 2 and basal section of Mz often par- 

 allel to one another but the latter usually shortened by the length and 

 obliquity of in. Squama naked; outer branches of M with macro- 

 trichia. Tibial spur-formula 1-1-2 or 1-2-2 ; claws ( $ ) toothed. 

 Male hypoiDygium strongly compressed, the tergite and sternite fused 

 into a continuous ring; median region of tergite produced caudad in- 

 to a simple or bifid depressed lobe, the apical margin of which is set 

 with small blackened spines. Gonapophyses usually appearing as pale 

 spatulate blades; a single or double tuft of yellow setae jutting from 

 the notch of the ninth sternite. 



Includes all members of the so-called "Yittatae" (the tricolor or 

 lateralis group), having the wings striped longitudinally with brown 

 and white. A few species are included that have the wings clear or 

 nearly so and with m-cu slightly more distad in position {tephro- 

 cephala), such forms apparently being consubgeneric. The most 

 aberrant species is iroquois, which has the tergite rather distinctly 

 separated from the sternite. Tipula diclinsoni has a depressed tergal 

 lobe that is very suggestive of members of this subgenus, but from 

 other characters is referred to another subgenus {Arctotipula) . 



