1932 ] Gerridse in the Museum of Comparative Zoology 107 
SOME MISCELLANEOUS GERRIDSE IN THE COL- 
LECTION OF THE MUSEUM OF COMPARATIVE 
ZOOLOGY (HEMIPTERA) 
By C. J. Drake and H. M. Harris, 
Ames, Iowa 
Through the courtesy of Mr. Nathan Banks, curator of 
Entomology in the Museum of Comparative Zoology at 
Harvard University, the writers have received for study 
a collection of miscellaneous Hemiptera from North and 
South America. The present paper is based upon the mem- 
bers of the family Gerridse in this collection. It includes 
notes on fifteen species, two of which are described as new. 
The types of these new species are deposited in the mu- 
seum. 
Gerris remigis Say 
Guerrero Mills, Hidalgo, Mexico, 3 specimens, collected 
by W. M. Mann. This is one of the commonest and most 
widely distributed gerrids in North America. It exhibits 
marked variation in both size and color. G. orba Stal and 
G. robusta Uhler are both synonyms of remigis Say. 
Gerris nyctalis Drake and Hottes 
Three specimens, Nicholsville, Newfoundland, Aug., col- 
lected by G. K. Noble; and one specimen, Sand Cove, New- 
foundland, Aug. 25, Fernald. Heretofore known only from 
the Rocky Mountain regions of United States and Canada. 
Gerris dissortis Drake and Harris 
Romaine Brooks, Newfoundland, Aug., G. K. Noble. 
Gerris incognitus Drake and Hottes 
Moscow, Idaho, A. C. Burrill, collector; and Metlakatla, 
