38 PROCEEDINGS OP THE NATIONAIi MUSEUM vol. GD 



Type localities. — Of trivittatum, Tampico, Mexico. Type in tlie 



U. S. National Miiseiim, Cat. No. 15408. 



U.S.N.M. 



Of disfinctum, Devils River, Texas. Type in 



IT. S. National Museum. Cat. No. 15958, 



U.S.N.M. 



Di^fHbution.—Mnxico: Tampico, December IT (E. A. Schwarz). 



Texas: Devils River, May 5, 1907 (Bishopp and 



Pratt). Victoria, December 13 (F. C. Bishopp). 



SIMULIUM HAEMATOPOTUM Malloch 



Simulium liacmatopotiim Mai.loch. U. S. Dept Agr., Bur. Eiit., Tech. Ser. 

 No. 26, 1914, p. 62. 



This species is easily characterized by the pearlaceous mesonotal 

 color, alternating with black stripes. The lateral pair are rather 

 broad and not sharply separated from the black stripes. The meso- 

 notal pile is brassy and the frons and clypeus pearlaceous. 



Female hj^popygium. Cerci rounded quadrate, infuscated, setose. 

 Anal lobe rather small, infuscated, ver}- sparsely setose, some coarse. 

 The ventral area produced with a small round point with fine pile. 

 A dorsal chitinizecl plate. Ovipositor flaps weak, but marked on 

 their inner angles with dark fimbriate lines; eighth segment heavily 

 chitinized, coarsely setose. Genital rod as in the foregoing (figs. 86 

 and 87) {notatum and others). 

 Thirteen specimens. 

 Type locality. — Vera Cruz, Mexico. Type in IT. S. National 



Museum, Cat. No. 15414, U.S.N.M. 

 Distribution. — Cuda : Cayamas, January 6 (E. A. Schwarz). 



Guatemala : Polochic River, March 22, 1906 ( H. S. 



Barber). 

 Mexico: Santa Lucrecia, October, 1911 (F. W. 

 Urich). Chiapa de Corzo, October. 1925 (A. L. 

 Herrera). 

 PoRTO Rico: Rio Piedras, January 24, 1912 (T. H. 

 Jones). 



SIMULIUM PIPERI. new .species ' 



Male. — Entirely black, including legs : anterior half of mesonotum 

 faintly and diifusely pale pollinose; thoracic pile brassy; scutellum 

 fringed with black hairs ; stem vein black pilose. 



Hypopygium: Side pieces quadrate, short; clasper thick at ba.se, 

 cxcavately tapered, twice as long as side piece, a spine at tip. 

 Adminiculum broad, arched, pilose, the basal prongs stout, rather 



