ART. 10 THE FAMILY SIMULIIDAE DYAE AND SHANNON 23 



EUSIMULIUM JOHANNSENI (Hart) 



SlmuKuni johannseni Hart, 27th Rept. St. Ent. 111., 1912, p. 32. 

 Simulium meridionalc MALLocn (part), U. S. Dopt. Art., Bur. Eut., Tech. 

 Ser. No. 26, 3914, p. 49. 

 Differs from jyeGuarum in having the stem vein white pilose ; the 

 abdomen more profusely pilose; the hind basitarsns with a slight 

 dorsal incision. Female hypopygium: Cerci rounded quadrate, 

 setose; anal lobes moderate, unmodified, similar to cerci. (Fig. 19.) 

 Ovipositor valves slight, membranous. Genital rod with the forks 

 largely' surrounding the orifice each with a long oval arm in place 

 of a tooth. (Fig. 42.) 



Male. — Side piece conical quadrate, as broad as long, ridge nearly 

 central, reentrant angle of margin long. Clasper stout, smooth, tip 

 obliquely truncate Avith rudimentary but large tooth on the angle, 

 not so long as side piece, nearly half as thick. Adminiculum arcuate, 

 somewhat truncate-tipped, hirsute, the basal prongs large, curved, 

 thick, forming an arc wider than the adminiculum. Adminiculum 

 arms with a small group of very long teeth at each outer fold, the 

 conjoined portion inconspicuous. Lateral plates large, grooved on 

 the margin. (Figs. 54 and 55.) 

 Twenty specimens at hand. 



Tyi)e locality. — Havana, 111. Type in the Illinois State Natural 

 History Laboratory. 



Distribution. — Idaho: Kendrick, May 25, 1902 (J. M. Aldrich). 

 IrxTNois: Havana, April 2G-]\ray 1, 1012 {C. A. 



Hart). White Heath, April 26, 1916 ( ). 



Massachusetts : Hyde Park, May 4, 1914 ( ) . 



Montana: Great Falls, July 7, 1921 (H. G. Dyar). 

 Ontario: Waubamic, Parry Sound, June 8, 1915 

 (J. M. Aldrich). 



EUSIMULIUM PUGETENSE, new species 



Male hypopygium : Side pieces conic-quadrate, as broad as long, 

 bridge broad, formed by basal and apical emargination of the chitin ; 

 basal reentrant angle short l)ut distinct. Clasper long, rather stout, 

 uniform, the tip roundedly angled, with short obsolete but stout 

 looth. Adminiculum broad, arched, the center depressed, with a 

 rounded hirsute nipple, the rest of the adminiculum smooth and 

 j)latelike; basal prongs stout, tapered, incurved, much darker than 

 the disk. Adminiculum arms with a single very long stout tooth in 

 each fold. (Figs. 121, 122, and 123.) 



Type locality. — Seattle, Wash. 



r^/^e.— Male, Cat. No. 28338, U.S.N.M. 



Distribution. — Washington: Seattle (C. V. Piper). 



