OSTEN SACKEN ON WESTERN DIPTERA. 209 



Section IX. — Tipulina. 



Are abundantly represented in California, both in species and speci- 

 mens. Pachyrrhince, however, so numerous in the Atlantic States, seem 

 to be rare. 



It would do but little good to describe the numerous species of my 

 collection until the Tipulce of the Atlantic States are better known. I 

 confine myself, therefore, to a small number of remarkable and easily 

 recognizable species, besides reviewing the Oalifornian species described 

 by Mr. Loew. I add the description of a remarkable Pachyrrhina from 

 the Kocky Mountains. 



Tipula PR^CISA Loew, Centur., x, 2 ; $ 9 . — A common species in 

 Marin and Sonoma Counties in April and May. I have two males from 

 Brooklyn, Alameda County, Cal. (Wm. Holden, M. C. Z.), with abor- 

 tive wings, which are hardly twice as long as the halteres; in all the 

 other characters, as well as in the structure of the hypopygium, they 

 agree with the males of T. prcecisa. I suppose this is a case of dimor- 

 phism. Mr. H. Edwards mentioned to me a subapterous Tipula, which 

 he found in company with the apterous Bittacus; it is probably this 

 very species. I found the Bittacus abundantly near Petaluma, and as- 

 certain now, by the dates, that the Tipula occurred to me on the same 

 day, and probably in the same locality ; but I did not find any of the 

 subapterous specimens. I recommend to collectors the verification of 

 the dimorphism which I suspect. 



Tipula pubeea Loew, Centur., v, 16.— Common in May in Marin 

 County, California (San Kafael, May 26, 27 ; also received from Mr. 

 H. Edwards and Mr. J. Behrens). 



Tipula fallax Loew, Centur., iv, 10. — California. I do not have it. 



Tipula beatula n. sp., $ 9 . — Wings with longitudinal gray shades 

 in the center of all the cells of the apical portion; thorax behind the 

 suture, including scutellum and metathorax, dark brown, shining, yellow 

 in the middle. Length of male ll-12 mm ; of the female, including the 

 ovipositor, 15-16 mm . 



Antennas but little longer than the head, brown; scapus brownish-yel- 

 low; joints of theflagellum 1-7 subcylindrical, elongate, inconspicuously 

 verticillate ; tip of the flagellum suddenly attenuate, with two or three 

 joints indistinct in dry specimens; thus the antennas seems to be only 

 11- or 12-jointed. Front and vertex grayish yellow, darker in the mid- 

 dle; rostrum brown above and below; palpi brown. Thorax yellowish- 

 gray, with three brown stripes and two shorter stripes on each side ; 

 behind the suture, and in front of the scutellum, the mesonotum is dark 

 brown or black, shining, with a yellow line in the middle; scutellum 

 yellow, shining, with a brown stripe in the middle ; metanotum dark 

 brown, shining in the middle, pollinose on the sides, and with a yellow 

 stripe. Knob of halteres brown, with a whitish spot at the tip. Ab- 

 domen brownish-yellow ; hind margins of the segments and an inter- 



