ART. 10 THE FAMILY SIMULIIDAE — DYAE AKD SHANNON 41 



anal lobe more pointed ventrally, more evenly infuseated, the arm 

 of the genital rod with a long sharp tooth centrally. (Figs. 67 

 and 68.) 



Three females taken " on cow." 



Type locality. — Virginia Dale, Colo. 



Type. — Female, paratypes two females. Cat. No. 28345, U.S.N.M. 



Dist7^hufion. — ^Colorado: Virginia Dale, September 31, 1912 

 (F. C. Bishopp). 



SIMULIUM METALLICUM Bellardi 



SimuUuiii luetuUicum Bellaudi, Saggio Ditter. Mess., vol. 1, 1859, p. 14. 



A rather small species easily distinguished by its pearlaceoiis nieso- 



notum with 3 distinct vittae; parallel sided, shining black frons; 



])earlaceoiis clypeiis; yellow coxae; bicolored legs and toothed claws. 



Female hypopygium : Cerci rounded quadrate, infuseated, setose, 



anal lobe with a dorsal plate ; sclerites ventrally rounded, triangular, 



more heavily chitinized than cerci, setose, curved back, truncate 



tipped, equaling the cerci. Arms of genital rod with chitinization 



and smaller tooth outwardly. (Figs. 72a and 73.) 



No males. Thirty specimens. 



Type locality. — Mexico, exact locality unknown. The type may 



be in Florence, Italy. 

 DistHhution. — Costa Rica: San Jose (F. Knab). 



Guatemala : Cacao, Trece xVguas, March 27, (H. S. 



Barber). 

 Mexico: Nogales (C. H. T. Townsend). Cordoba, 



December 21, 1907 (F. Knab). 

 Trinidad : Mendoza, August 24, 1908 (F. W. Urich) . 



SIMULIUM PARNASSUM Malloch 



Simulhtm parnassum Mai.loch, U. S. Dept. Agr., Bur. Ent., Tech. Ser. 

 No. 26, 1914, p. 36. 



A medium sized blackish species with shining frons, yellowish 

 coxae; fore tibia with scarcely a trace of the white pollinose patch; 

 claws toothed ; mesonotum and stem vein black pilose. Hypopj^gium 

 exactly as in arcticum Malloch. (Figs. 65 and 66.) Male hypopygium. 

 Sidepieces short, shouldered at an acute angle. Clasper stout, uni- 

 form, twice as long as sidepiece, a spine at tip. Adminiculum with 

 large oblique basal arms from an elliptical lacuna, the tip narrow, 

 overlined by a triangular membrane with long hirsute tip. Admini- 

 culum arms strongly margined with several long teeth in the folds 

 mixed with numerous fimbriae; lateral plates large, fimbriate. 

 (Figs. 103, 104, and 105.) 



This species attacks man freely. Thirty-five specimens. 



