1909] DOANE — TIPULA 17 



MORE TIPULA WITH VESTIGIAL WINGS. 



BY R. W. DOANE, STANFORD UNIVERSITY, CAL. 



Since sending in the manuscript for the article on "A New Species of Tipula 

 with Vestigial Wings," Psyche, Vol. XV, No. 3, three other species which have the 

 wings more or less reduced have come to me. In one of them, T. quay Hi, the wings 

 are reduced to mere pads in both sexes. In another, T. silvestra the wings of the 

 ? (c? unknown) are about like those of the 9 of T. vestigipennis. In T. williamsii 

 the wings of the $ are reduced to about \ the size of those of the cT which are normal. 

 The three species here described together with T. simplex and T. vestigipennis make 

 an interesting series. 



Tipula williamsii n. sp. Brownish yellow; head yellowish brown, darker above, 

 with a more or less distinct darker line in the middle ; rostrum, first segment of palpi 

 and first three segments of antennae yellow; second segment of palpi from yellow 

 to brownish, others dark brown ; segments of antennae beyond the third dark brown, 

 black at the base; thorax brownish or grayish yellow; dorsal stripes brown, rather 

 broad, the median one divided; scutellum, metanotum and pleura hoary; halters 

 brownish, yellow at the base, knobs brown; legs brownish yellow; tarsi and the 

 tips of the femora and tibia brown; abdomen brownish, more yellowish at the base, 

 with darker dorsal and lateral stripes; posterior margin of the 8th sternite in the 

 male somewhat crescent shaped, with two median tufts of rather long yellow hairs, 

 lateral margin with sub-triangular membranous appendages from the posterior margin 

 and the tips of which arise shorter yellow hairs, those at the tip being longest; just 

 above the base of the median yellow tufts and usually hidden by them is a short, 

 triangular, reddish, hairy, membranous appendage; posterior margin of 9th tergite 

 somewhat crescent shaped, very slightly serrate and with a median pair of thin plates 

 which are twisted in such a way that their edges are uppermost; 9th sternite almost 

 divided by a deep narrow 'U' shaped incision; pleural suture complete, setting off 

 the two sub-triangular sub-dorsal pleura; three pairs of apical, spatulate appendages, 

 the 2nd largest and united at the base with the 3rd; ovipositor brownish, valves red- 

 dish; upper valves of moderate length, acute very slightly arcuated; lower valves 

 acute reaching beyond the middle of the upper valves; wings hyaline with a smoky 

 tinge and with a slight yellowish tinge along the anterior margin, a whitish band 

 extending from in front of the stigma across the discal cell into the 4th posterior cell; 

 a whitish spot beyond the stigma, stigma brownish; wings of 9 but little more than 



