THE CANADIAN ENTOMOLOGIST SO'i 



Rhodites ostensackeni, sp. nov. 



Female. — ^Head black, roughly and evenly rugose. Antennae 

 14-iointed, 3rd joint very long, following joints considerably 

 shorter and subequal. Thorax black, highly polished, sparsely 

 punctate but densely so between the parapsidal grooves at the 

 scutellum, and with scattered, minute, yellowish hairs. Parapsidal 

 grooves very distinct, deep and finely punctate. Median groove 

 fine and continuous. Anterior parallel lines indistinctly evident. 

 Lateral grooves short and distinct. Pleurae finely rugoso-punctate 

 without a smooth, shining area. Scutellum opaque, finely rugose, 

 basal fovea wanting. Abdomen black or piceous, subglobose, 

 microscopically punctate from the fourth to last segments, basal 

 segments smooth. Ventral spine stout, extending slightly beyond 

 the last segment. Legs rufous. Wing hyaline, clouded with 

 yellowish brown in the radial cell and a little beyond. Veins dark 

 brown. Radial area open at the costa. Cubitus continuous. 

 Areolet large. Length 3-3.75 mm. 



Gall. — (Plate IX, Figs. 11, 12). On the roots oi Rosa mitkana. 

 Polythalamous. Irregularly rounded and composed of confluent 

 nodules, and is more or less irregularly grooved. At the place of 

 attachment it is on a short stalk, and the gall may be easily re- 

 moved. Inside are numerous hard larval cells firmly imbedded in 

 the pith\- substance. It looks very much like a miniature gall of 

 Rhodites radicum. Width 12-17 mm. Height 10-15 mm. 



Habitat. — Corvallis, Oregon. (B. G. Thompson). 



A distinct species allied to Rhodites utahensis and R. radicum. 

 The galls were sent to me by Mr. Thompson early in February, 

 and the flies began to emerge about March 30th and early in 

 April. Named in honour of the late R. von Ostensacken, the 

 pioneer on the work of American Cynipidae. 



Rhodites bassetti, sp. nov. 



Female. — Head black, densely punctate on the face, less so on 

 the vertex and cheeks. Antennje black, 14-jointed. Thorax 

 black, very densely and finely punctate, subopaque. Parapsidal 

 grooves rather sharply defined, continuous and widely apart at 

 the scutellum. Median groove delicate and scarcely defined 



