DIPTERA— TIPULID^. 573 



Spiladomyia simplex. 



PI. 5, Fig. 37, 38. 



Spiladomyia simplex Scudd., Bull. U. S. Geol. Googr. Surv. Terr., Ill, 750 (1877). 



A single specimen and its reverse show nearly all the parts of the 

 body, but all are faintly preserved, so as to be very difficult of study. The 

 sjjecimen is a female ; nearly all the legs are preserved, and all but the base 

 of the wings; the latter, however, trail along the abdomen, so that parts are 

 obscured and the neuration is exceedingl}^ faint. The head is small, the 

 eyes almost exactly circular, the palpi a little shorter than the head, the 

 antennse composed of cylindrical joints, a little longer than broad, the legs 

 slender, with femora, tibia'^, and tarsi of nearly equal length, and the wings 

 as long as the body. The anterior branch of the fourth longitudinal vein 

 is abruptly bent at its base, so as nearly to connect with the cross-vein 

 uniting it with the third longitudinal vein, and the first and second posterior 

 cells are scarcely more than three times as long as broad. The third poste- 

 rior cell is but very insignificant, as the posterior branch of the fourth 

 longitudinal vein forks but slightly and near its tip. The neuration of the 

 lower part of the wing is uncertain. 



Length of body, T.S"""; palpi, 0.35"™; fore femora, 4.5™™; middle 

 femora, 4.5"™; hind femora, 4.5'""; fore tibia3, 4.65"™; middle tibia?, 4.5°""; 

 hind tibiaj, 4.5"""; fore tarsi, 4'"""; middle (or hind) tarsi, 4.5™". Measure- 

 ments of tarsi uncertain. 



Chagrin Valley, White River, Colorado. (W. Denton.) 



PRONOPHLEBIA Scudder (Trpcov, (pAd^wv). 



Pronophlebia Scudd., Bull. U. S. Geol. Geogr. Surv. Terr., Ill, 750 (1877). 



This genus- differs from all TipulidjB known to me in the early origin 

 of the third longitudinal vein, which springs from the second almost imme- 

 diately after its own separation from the first longitudinal vein and some 

 way before the tip of the auxiliary vein ; the second longitudinal vein 

 arises near the middle of the wing and ])ranches, the inner branch apparently 

 forking near its tip. These characteristics readily serve to distinguish it 

 from other Tipulidje. The head is small, the antennaj long, very slender, 

 and more than thirteen-jointed. They are too imperfect in the specimen 

 studied to allow of any further statement. The palpi are not preserved, but 



