U. S. D. A., B. E. Bui. 116, Part III. 



D. F. I. I., Issued January 31,191: 



PAPERS ON DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 



THE CHERRY FRUIT SAWFLY. 



(Hoplocampa cookei [Clarke]). 



By S. W. Foster, 



Entomological Assistant. 



INTRODUCTION. 



The cherry fruit sawfly is an insect comparatively little known to 

 science. It was first described by Prof. W. T. Clarke in the Cana- 

 dian Entomologist, volume 38, No. 11, page 353, under the name 

 Dolerus cookei. In 1910 specimens of this species were brought to 

 the attention of Mr. S. A. Rohwer, of the Bureau of Entomology, 

 who referred it to the genus Hoplocampa. As he was unfamiliar 

 with the type of cookei, he considered that it represented an unde- 

 scribed species, for this latter was destroyed in the insect collections 

 by the San Francisco fire. Mr. Rohwer, however, as a result of the 

 examination of abundant material, has come to the conclusion that 

 his and Clarke's species are the same insect, which should now be 

 known under the name of Hoplocampa cookei (Clarke) . Mr. Rohwer's 

 description of the species as Hoplocampa californica is given herewith, 

 as taken from Technical Series No. 20, Part IV, of this bureau, page 

 143: 



Female. — Length 3.5 mm. Clypeus broadly, shallowly, angulately emarginate, 

 lobes broad, obtusely triangular; supraclypeal area convex, finely granular; antennal 

 furrows wanting, antennal foveae small; middle fovea elongate, shallow, not well 

 defined; ocellar depression small, distinct, not sharply defined; postocellar area well 

 defined on all sides; head and mesoscutum with small, separate, well-defined punc- 

 tures; antennae rather slender, third and fourth joints equal; sheath slightly concave 

 above, slender, convex below from apex; cerci short, stout; stigma broadest near base, 

 strongly tapering to apex; transverse radius strongly oblique, in apical third cell; 

 third cubital cell longer than first and second combined. Black; clypeus, labrum, 

 mandibles (except piceous apices), orbits, occiput (except postocellar), tegulse, 

 anterior legs (except coxae), intermediate femora, and part of posterior femora reddish 

 yellow; posterior femora in part, most of four hind tibiae, and tarsi black or brownish; 

 wings hyaline, iridescent; venation pale brown, stigma in part pallid. 



Paratopotypes show that the four hind legs may be mostly black, the posterior 

 orbits pale and the pale spots of the occiput reduced in size. 



66713°— 13 73 



