574 TERTIARY INSECTS OF NORTH AMERICA. 



the thorax is strongly arched and the neuration indicates that the genus 

 belongs to the Tipulidse brevipalpi, and with other signs that it is probably 

 one of the Limnophilina, although the auxiliary cross-vein appears to be 

 exactly opposite the origin of the second longitudinal vein. It is perhaps 

 most nearly allied to Tri choc era. 



PRONOPHLEBIA REDIVIVA. 



PI. 5, Fig. 39. 

 Pronophlebia rediviva Scudd., Bull. U. S. Geol. Geogr. Surv. Terr., Ill, 750-751 (1877). 



The single specimen of this species is spread at full length, but the 

 stone containing it is broken. The specimen is a male. The antenna? are 

 considerably longer than the head and thorax together, and the joints are 

 shaped and ornamented as shown in the figure of Dolichopeza in Walker's 

 Diptera Britannica. The head is small and the eyes so well preserved that 

 they can be seen as in a living creature. The wings are very long and 

 slender ; the auxiliary vein terminates some distance beyond the middle of 

 the wing ; the first longitudinal vein about midway between that and the 

 tip; the second longitudinal vein arises just within the middle of the wing, 

 and the third longitudinal vein less than half the distance from that to the tip 

 of the auxiliary vein ; the second longitudinal vein forks just beneath the tip 

 of the auxiliary vein, its upper branch bends just beneath the tip of the first 

 longitudinal, and its lower branch appears to fork just beyond the middle 

 of its course. Cross-veins appear to divide the interspace between the 

 second and third longitudinal veins (the second submarginal cell) into three 

 equal parts, and there is certainly a cross-vein in the interspace between 

 the fourth and fifth longitudinal veins (the second basal cell) directly oppo- 

 site the origin of the third longitudinal vein. 



Length of body, 9.25 mm ; antennae, 2.6 mm ; wings, 9.25 mm . 



White River, near the Colorado-Utah boundary (W. Denton). 



CYTTAROMYIA Scudder (uvrrapos, juvta). 



Cyttaromyia Scudil., Bull. U. S. Geol. Geogr. Surv. Terr., Ill, 751 (1877). 



This genus of Tipulidae differs somewhat remarkably from any known 

 to me. Tt appears to belong among the Tipulidiu brevipalpi, the first longi- 

 tudinal vein terminating in the second much in the manner of Dicranomyia, 

 with which, however, this genus seems to have little else in common. 



