32 PROCEEDINGS OF THE NATIONAL, MUSEUM vol. «9 



SIMULIUM MERIDIONALE Riley 



SimuUum rneridiotiale Riley, Kept. Dept. Agr., 1886, p. 513. 



An examination of the old material of this species remaining in 

 the collection discloses the fact that it contains two sets of material. 

 Only two females are left of the original type material (described 

 1886). These have labels in Riley's handwriting "3982 (bred) Mc. 

 16, '86; tj'^pe." The second set of specimens, males and females, 

 bearing the same lot number, 3982, also bear a label giving the year 

 1888 (in Pergande's writing). According to the female genitalia 

 the second series of specimens is a different species. They prove to 

 be conspecific with specimens of the type series of oceideritale Town- 

 send, hence must go under this name. We have no additional ma- 

 terial of the true meridionale; while the large number of specimens 

 (210) of this particular group from all but the northeastern parts 

 of North America agree with the occidentale form. 



General color dark opaque gray; pile entirely pale; frons opaque 

 gray, distinctly narrower than the width of the clypeus; legs black, 

 including fore coxae, mesonotum trivittate; abdominal pile rather 

 dense and conspicuous, pale; second to sixth tergites greatly re- 

 duced, opaque dark gray, the dark coloring extending outward and 

 merging with the grayish venter; remaining tergites of nearly full 

 width, grayish pruinose ; claws with the base greatly produced, mak- 

 ing them appear bifid ; stem vein pale pilose. 



Cerci rounded, quadrate, infuscated, setose; anal lobe similar, 

 arcuate, moderate; ovipositor flaps membranous, the tips separated. 

 Genital rod with the forks triangularly expanded beyond the middle, 

 a ver}^ slight tooth on the outer side of the arm at the expansion. 

 (Figs. 62 and 63.) 



No males are at hand. 



Type locality. — Probably Lake View, Miss. One of the two 

 specimens marked "type (bred)" bears the date March 16, 1886, the 

 other is undated. In the notes under No. 3892, the first entry is 

 dated March 26, 1886; " Received from O. Lugger, Lake View, Miss.. 

 some small larvae of Simulium.'' More material is recorded March 

 31, April 3 and 6, 1886, all from the same source, and in the last 

 entry the receipt of a bred adult is mentioned, probably one of the 

 types before us. Type, Cat. No. 773, U.S.N.M. 



SIMULIUM OCCIDENTALE Townsend 



Simulium occidentale Townsend, Psyche, vol. 6, 1891, p. 107. 



Simulium tamaulipense Townsend, Journ. N. Y. Ent Soc, vol. 5, 1897, 



p. 171. 

 Simulium forhesi Malloch, U. S. Dept. Agr.. Bur. Ent.. Tecli. ser. No. 26, 



1914, p. 50. 

 Simulium meridionale Malloch (not Riley), U. S. Dept. Agr., Bur. Ent., 



Tech ser. No. 26. 1914. p. 50. 



