ART. 10 THE FAMILY SIMULIIDAE LYAR AND SHANNON" / 



PROSIMULIUM DICUM, new species 



Female. — Close to inagnum. Antennae entirely dark; stem vein 

 black pilose; body pile abundant and pale; legs dark or in part 

 brownish yellow. Differs from magnum in being a little smaller; 

 the darker basal antennae joints and smaller third joint a little 

 broader than long. Ovipositor: Long, strong, sheaths darkly mar- 

 gined within, reaching near the end of the anal lobes. Cerci rounded 

 quadrate, moderately sized, setose, and spicular. Anal lobes coni- 

 cally produced, reaching as far as cerci, sparsely setose above, denselj'' 

 and coarsely so ventrall}^ Genital rod down-curved at tip, forked, 

 the arms short, with a short quadrate chitinous plate with produced 

 angles. (Figs. 5 and 6.) 



Type locality. — Hoodsport, Wash. 



Types. — Two females, paratypes 3 females, Cat, No. 28327, 

 U.S.N.M. 



Thirty-five specimens at hand, all females. 



Distribution. — Alaska : Ketchikan, June 20, August 6, 1919 (H. G. 

 Dyar). 

 British Columbia : Prince Rupert, June 7-17, 1919 



(H. G. Dyar). 

 Washington: Hoodsport, May 3-11, 1924, July 6, 

 1920 (H. G. Dyar). 



PROSIMULIUM DICENTUM, new species 



Differs from dicuin in having stem vein pale pilose. The female 

 anal lobes are more rounded, less coarsely hairy ventrally than in 

 dicum. (Figs. 7 and 8.) 



Type locality. — Truckee, Calif. 



Tijpe.—Fem^lQ, Cat. No. 28328, U.S.N.M. 



Distnhution. — California: Truckee, April 22, 1921 (H. G. Dyar). 



PROSIMULIUM FULVUM CoquUIett 



Prosimiiliiim fnlvum Coquilt.ett, Proc. U, S. Nat. Mus., vol. 25, 1903, p. 96. 



The bright yellow color easily distinguishes this species in both 

 sexes from all others of the genus except onychodactylum which has 

 bifid claws. Female ovipositor weak, the cerci and abdominal tips 

 as in hirtipes but weakly chitinized and pale. (Fig, 9,) Male 

 genitalia as in hirtipes, except that the parts are weakly chitinized 

 and pale brown instead of black. (Figs, 20 and 21.) 



Fulnnm is an abundant species in the mountainous regions, chiefly 

 in the Pacific Nortlnvest. It has been reported attacking man and 

 animals. The immature stages remain unknown. One hundred 

 and sixty-three specimens at hand. 



Type locality. — Bear Paw Mountain, Mont. Type in U. S. 

 National JNIuseum, Cat. No. 6182, U.S.N.M. 



