U. S. D. A., B. E. Bui. 82, Part VII. Issued February 18, 1911. 
SOME INSECTS INJURIOUS TO TRUCK CROPS. 
NOTES ON VARIOUS TRUCK-CROP INSECTS. 
By F. H. Chittenden, Sc. D. 
In Charge of Truck Crop and Stored Product Insect Investigations. 
ON THE NATURAL ENEMIES OF THE COLORADO POTATO BEETLE. 
SOME INSECT ENEMIES OF THE POTATO BEETLE. 
Few, if any, noxious insects have so many recorded natural enemies 
as the Colorado potato beetle (Leptinotarsa decemlineata Say). A 
list of these has been recently compiled by the writer. a A few species 
not previously recorded have since been reported by special corre- 
spondents and agents of this office, and these will be mentioned here. 
Pterostichus lucublandus Say. 
July 3, 1908, Mr. J. Byron Roney, Plainville, Mass., sent specimens 
of the ground beetle Pterostichus lucublandus Say and reported that 
it was found on that date busily engaged in devouring the grubs of 
the Colorado potato beetle. Although this is an extremely common 
insect, one of the best known of the Carabidse, it has not hereto- 
fore, to the writer's knowledge, been recorded as an enemy of the 
potato beetle. 
Apateticus (Podisus) marginiventris Say. 
Apateticus (Podisus) marginiventris Say, which closely resembles 
the spined soldier-bug (P. maculiventris Say), a well-known enemy 
of the Colorado potato beetle and other injurious insects, was ob- 
served attacking the larvse of this potato beetle by Mr. H. O. Marsh, 
Chester, N. J., in August, 1908. 
Perilloides (Perillus) bioculatus Fab. 
Perilloides (Perillus) bioculatus Fab., a pentatomid bug, as is the 
preceding species, was reported by Mr. D. H. Shannon, Appleton, 
Wis., as having been noted killing the Colorado potato beetle in 
August, 1908. Two bugs were noticed attacking a mature beetle. 
They held it by the head and refused to relinquish their prey when 
the beetle was pulled off from the potato stalk on which it was feeding. 
«Cir. 87, Bur. Ent., U. S. Dept. Agr., pp. 10-12, June 3, 1907. 
85 
