Ai:r. 10 TBE FAMILY SIMULIIDAE DYAR AND SHANNON 15 



Type locality. — Cambridfre, Mass. Type in U. S. National 



Museum, Cat. No. 10380, U.S.N.M. 

 DUtnbution.- — Illinois : Elizabeth, July 7, 1917. 

 Kansas : (J. M. Aiclrich') . 

 Maryland: Plummers Island, April 19, 190o (H. 



S. Barber). 

 Massachusetts: Cambridp;e, May 31. 1809 {H. A. 



Hagen ? ) . 

 Michigan: Battle Creek (J. M. Aldrich). 

 New Hampshire: Franconia (A. T. Slosson). 

 South Cakolina: Spartanburo-, July "25, 1913 (A. 



W. Jobbins-Promeroy). 



EUSIMULIUM OBTUSUM, new species 



.\.n allied species is before us, male examples only, which we have 

 consequently been unable to place in the table. 



Male hypopya'ium: Side piece stout conic, large chitinous ridge 

 luilf the side piece, reentrant portion oblique, lateral, clasper small 

 and stout, but broad, with square tips, a tooth on each angle. Admi- 

 niculum with divaricate triangular basal arms, but itself broadly 

 concave, hirsute. Adminieulum arms with two long divaricate teetli 

 from the base of a convex strigose membrane. (Figs. 27, 28, and 

 29.) 



Type locality. — Redlands, Calif. 



dotypes.—Ty^^o males. Cat. No. 28331, ILS.N.M. 



J >htnlnition.~CMAvo\\^iA : Redlands. 1914 (F. R. Cole). 



This may be the male of the species we here identify with Ensi- 

 muUwii aureuin (Fries) of Europe. If this be the case, aureuvi and 

 J)racteatum must be considered as distinct species instead of races 

 as we here place them. We are unsupplied with sufficient material 

 of tlie European form to decide Avhether auremn is tlie same as our 

 western form as we here assume, or as the eastern one {hracteatum) ^ 

 or whether it is distinct from both. We retain the name ohfusum, to 

 cover these eventualities. 



EUSIMULIUM MEXICANUM (BcUardi) 



, Siiuiilimn Diej-icanuin BELLAKni. Ditlerloiiia Messican:). Append. C, 1S61, 

 p. .3. 



A large species, showing strong relationships with Swiuliv/ni 

 proper. The subshining frons, yellowish basal antennal joints, yel- 

 low coxae, bicolored legs; abdominal tergites reduced to small opacjiie 

 plates, the terminal tergites shining, well developed apical projec- 

 tion on hind basitarsus and well marked dorsal incision of hind sec- 

 ond tarsus which characterize this species are also found in t5''pical 

 species of Siviurmm. In addition it shonld be noted that the tho- 



