206 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



before me, 1 cannot give a detailed description; but the following state- 

 ment, prepared from some data kindly furnished by Mr. Edwards in a 

 letter, will render the species recognizable. 



It is very much like both P. rivosa and albivitta, bat differs in the 

 abdomen being unicolorous, brown above, without the brown dorsal 

 stripe (consisting of a series of triangles in P. albivitta, more continuous 

 in P. rivosa) and the whitish lateral borders. The brown design of the 

 wings is nearly the same, but the brown is not continued toward the 

 margin, along the last section of the fifth vein; it thus forms an angu- 

 lar stripe along the central cross-veins and the anterior section of the fifth 

 vein; the hyaline space inclosed between this stripe and the brown an- 

 terior border is smaller and more curved than in P. albivitta. 



The interruption of the brown stripe along the fifth vein, before reach- 

 ing the margin, occasionally takes place in both P. rivosa and albivitta ; 

 at least, I consider P. contermina Walker, which shows this peculiarity, 

 as a mere variety of P. albivitta. 



Ehaphidolabis spec. — A single specimen from Grafton, San Bernar- 

 dino, Cal., has the wings exactly like Monogr., iv, tab. ii, f. 17. The 

 thorax having become greasy, I am not able to ascertain whether it is 

 E, tenu'ipes or not. 



List of TiPULiD.E BREVIPALPI from Colorado. 



Dlcranomyia longlpennis. — Europe; Atlantic States; Denver, Colo. 

 (Uhler). 



Limnobia indigena, — Atlantis States and Colorado (Kelso's Cabin, foot 

 of Gray's Peak, at 11,000 to 12,000 feet altitude, July 6, A. S. Packard). 



Empeda n. sp. — Georgetown, Colo., July 8 (A. S. Packard). 



Erioptera caloptera. — Atlantic States and Colorado. 



Symplecta punctipennis. — Europe and Korth America ; also in Chili. 

 (Boulder City, Colo., June 29, A. S. Packard ; Denver, P. R, Uhler.) 



Amalopis n. sp. — Idaho, Boulder, Georgetown, Colo., June, July (A. 

 S. Packard). Very like the undescribed species from Southern Cali- 

 fornia, mentioned above ; perhaps identical. 



Of Section VII, Cylindrotomina, no species has been discovered in 

 California yet, nor in any part of the Western Territories. 



Section VIII. — Pty diopter ina. 



Ptychoptera lenis n. sp. — Male and female. — Antennae black, except 

 the first joint, which is red; base of palpi also reddish; hypostoma 

 reddish, in some specimens darker ; front black, shining. Thorax black , 

 subopaque; pleurae silvery-pruinose ; scutellum reddish. Abdomen 

 black, shining; male genitals dark brown; ovipositor reddish. Legs 

 reddish, including coxte, which are more or less black at the root, and 

 have a more or less distinct black streak about the middle ; hind coxfe 

 black, except the tip ; femora brown at tip ; tibiae brownish, darker at 



