ART. 10 THE FAMILY SIMULIIDAE DYAR AND SHANNON 27 



Fore coxae yellow. 



Tergites large, tbe filth large and subshiuing like the following; frons sub- 

 opaque; uiesouotuni with a pair of indistinct vittae decorum Walker. 



Tergites 2, 3, 4, 5, and 6 greatly reduced, the 6th yellowish with a cen- 

 tral black spot. Frons opaque or pearlaceous. 

 Mesonotum with 7 distinct stripes. 

 With 3 dark stripes. 



The juile stripes pearlaceous; frons pearlaceous. 



haematopotum ^Mailoch. 



The pale stripes silvery white; frons gray trivittatiim Malloch. 



With 3 orange-colored stripes bivittatiim ^Malloch. 



Mesonotum with a single stripe or none ; frons grayish. 

 Mesonotum with a distinct median stripe. 



Sect)nd tergite without central black spot venator, new species. 



Second tergite with a black spot mediovittatiim Knab. 



Mesonotum with an indistinct stripe or none. 



Mesonotum strongly arched notatum Adams. 



Mesonotum moderately arched griseuni Coquillett. 



Tergites 3, 4, and 5 greatly reduced, opaque velvetf perissum, new species, 

 black; remaining shining | vennstiim Say. 



The following are not placed in this table: hydationis, piperi, vandaUctim, 

 and jacumbae. 



SIMULIUM PICTIPES Hagcii 



Simulium pictipes Hagex, Proc. Bos. Soc. Nat. Hist., vol. 20, 1879, p. 305. 

 Simulium inm.ox'mm Comstock, Manual for the Study of Insects, 1895, 

 p. 452. 



A close ally of Simulium vittatum. Differs in havin«>- three ineso- 

 notal vittae; fore tibia entirely blackish and without the poUinose 

 area, although the pile is whitish, and the l)lack markiniis of the 

 abdomen undivided. 



Female hypopygium : Cerci rounded quadrate, infuscated, setose. 

 Anal lobe conically produced ventrally, chitinized, especialh' on 

 anterior edge, finely pilose behind. Ovipositor flaps thin, membra- 

 nous, rather remote, narrow ; arms of genital rod widely triangular, 

 widened outwardly, chitinized there, with a small tooth before the 

 widening. (Figs. 60 and 61.) 



Male hypopygium : Side-piece quadrate, outer apical angle pro- 

 duced. Clasper long, rounded, contracted centrally, without ter- 

 minal spine. Adminiculum broad, membranous, pilose, cleft mesi- 

 ally nearly to its base. Adminiculum arms with a group of rather 

 large but few teeth in the bends; lateral plate large. (Figs. 100, 

 101, and 102.) 



Tyi)e locaJities. — Of pictipes, Au Sable Kiver, N. Y, Type in the 

 Museum of Comparative Zoology, Cambridge, 

 Mass. 

 Of innoxium, Ithaca, N. Y., type presumably in 

 the Cornell University collection. 



Our records of pictipes are confined to the Eastern United vStates. 



Fifty-two specimens. 



