July 10, 1914 
Vol. XXVII, pp. 123-124 
PROCEEDINGS 
OF THF, 
BIOLOGICAL SOCIETY OF WASHINGTON 
SUPPLEMENTARY NOl’ES ON 
PERUVIAN SIMULIID^. 
BY FREDERICK KNAB. 
Bureau of Entomology, U. S. Department of Agriculture. 
Just after the appearance of my paper on Peruvian Simuliidse 
(Proc. Biol,. Soc. Wash., Vol. XXVII, pp. 81-85) an additional 
small lot of specimens was received from Peru, recently collected 
by Professor Townsend. These comprise another new species 
and enable me to add other interesting data. 
Simulium gaudeatum Knab. 
The specimens described under this name were taken by Townsend in 
Verrugas Canyon, June 25, 1913. 
Simulium seriatum Knab. 
Two more females, taken at Chosica. Townsend observed that in tliis 
species the eyes are brown during life. 
Simulium escomeli Roubaud. 
A single female of the typical form, that is, with the mesonotum striped 
ferruginous yellow and pale grey, was taken by Townsend at Santa Clara, 
altitude 1300 feet, iu April. A female, taken on the window of the hotel 
at Matucana on April 22, is extreme in the dark ground-color of the 
mesonotum. The three stripes of ground-color are velvet black in direct 
liglit, deep brown when viewed obliquely. In the typical form the 
.mesonotum is black liefore the scutellum; iu this specimen the ante.scu- 
tellar region is grey. The scutellum is pale yellowish. In other respects 
the specimen agrees with typical escomeli. It would seem that these dark 
variants are peculiar to the higher altitudes. 
Simulium glaucophthalmum new Species. 
Female. —Occiput, Irons and face black, grey jn-ninose, the Irons broad, 
its sides rectilinear and slightly converging. Antennce with the two basal 
joints ferruginous yellow, the others brown, shading to blackish towards 
(123) 
29— Proc. Biol. Soc. Wash., Vol. XXVII, I'.il t. 
