98 THE CANADIAN ENTOMOLOGIST. 



differs from the others by its smaller size, by having the thorax narrowed 

 forward, and with the elytra giving it a more elliptical form, and by the 

 elytra in both sexes being reticulate and opaque. 



Horpalus nitidulus, Chand. Mo. Common. Long. -20, -28 in. 



Elliptical, rufo-piceous shining; legs, mouth and antennae testaceous. 

 Head and thorax perfectly smooth, the latter narrowed in front, sides and 

 basal angles rounded, sides not depressed, basal foveas nearly obsolete, not 

 punctured. Elytra smooth and shining in both sexes, striae not deep, inter- 

 stices somewhat flattened, with a dorsal puncture as usual. This is our 

 smallest species of the true genus Harpalus. 



GALLS FOUND ON PLANTS OF THE GENUS RUBUS. 



BY H. F. BASSETT, WATERBURY, Conn. 



I think the gall described in the last number of the Entomologist, by Mr. 

 Win, Couper, as found on the roots of the raspberry, has never been noticed 

 before. I have in my collection a species of gall fly, hitherto undescribed, 

 belonging to the genus Diastrophus, which I reared in great numbers from 

 galls found on the roots of Rulus villosus, the common blackberry, these 

 galls were polythalamous however, and are undoubtedly distinct from his 

 species. 



Mr. Couper says his galls are from the roots of the common raspberry. 

 Does he mean the Ruhus strigosus, so common in northern New England, or 

 Rubus occidentalism which is the most common species in northern Ohio? or 

 does he refer to some other species ? I shall be glad to learn the species 

 and also to receive specimens of the galls and gall insects, as I have made 

 the Hymenopterous gall-flies a special study for several years, and I have 

 several species from this same genus of plants, some of which are undescribed 

 The only m r Mothalamous species yet described as occurring on plants of 

 the genus Rubus, is Diastrophus cuscutaeformis, 0. S. Diastrophus poten- 

 tillae, Bassett, is found on a plant belonging to the same order (Genus 

 Potent ilia Canadensis) and is monothalamous. It is developed from the 

 axillary buds of the stems. 



I submit for publication a description of the Blackberry root gall and gal. 

 fly, — Diastrophus radicum, N. Sp. 



Galls. On the roots of Rubus villosus, of very irregular shape, and 

 varying in size from those of the shape and size of a pea to those two inches 

 or more in length, and nearly an inch in diameter, and containing few or 

 many larvae according to size. The galls are occasionally found on the part 

 of the stalks of the blackberry which is below the surface. 



Insect, <j>. Head black, smooth, ocelli small, face black, hairy, the hairs 

 close and converging towards the mouth; Antennae 13 jointed, joints short, 



