K'hisey: Stvflief^ of Cyvipid^. 



55 



Diplolepis bassetti (Beutenmuller) 



FEMALE. — Mostly black, legs largely rufous; parapsidal grooves 

 very distinct, continuous; mesonotum distinctly coriaceous, punctate, and 

 hairy; scutellum without foveas; radial and part of cubital cells smoky. 

 HEAD: About as broad as or somewhat broader than the thorax; black, 

 mandibles dark rufous, piceous on the tips; front coriaceous, smooth in 

 part, naked; face puncto-rugose, hairy. Antennae almost wholly black, 

 sometimes the two basal seg-ments tinged piceous; finely pubescent; with 

 14 segments, the second globose, the third almost twice the length of 

 the fourth, the last almost twice the length of the preceding, an in- 

 complete division indicated. THORAX: Wholly black; mesonotum shin- 

 ing, smoothed, coriaceous in places, especially between the parapsides 

 posteriorly, scatteringly punctate and hairy; parapsidal grooves very 

 distinct, continuous to the pronotum, tho obscured in sculpturing 

 anteriorly, only gradually divergent anteriorly, gradually but not 

 very closely convergent posteriorly; median groove distinct at 

 the scutellum, indicated a third of the mesonotal length; an- 

 terior parallel lines fine and faint, indicated more than half 

 the mesonotal length; lateral lines practically absent; pronotum later- 

 ally rugose; mesopleuras rugose dorsally, mostly smooth and shining, 

 crossed by a moderately broad, rugose, horizontal line; scutellum quite 

 elongate, well rounded posteriorly, closely rugose, depressed anteriorly 

 only laterally, without foveas, a broad, elevated ridge extending from 

 the mid-point of the scutellum to the mesonotum. ABDOMEN: En- 

 tirely black, entirely smooth, shining, naked; distinctly elongate, more 

 than half again as long as high, segments produced somewhat dorsally, 

 only moderately rounded ventrally, the second segTnent covering only 

 about one third of the total area; ventral sheath produced, plow-shaped, 

 the spine short. LEGS: Brownish rufous with more or less piceous, 

 tarsi less bright, the tips dark; covered with hairs; tarsal claws weak, 

 simple. WINGS : Finely ciliate on the margins, yellowish, entirely 

 smoky, most so in the radial cell and nearby in the cubital cell; veins 

 heavy, dark brown; areolet distinct; cubitus becoming fine, but reaching 

 the basalis below the midpoint; radial cell open (!), tho somewhat 

 darkened on the margin, very short and broad; second abscissa of 

 radius not greatly curved; first abscissa of the radius angiilate at about 

 75°, with a short but very distinct projection. LENGTH: 2.0-3.2 mm. 



MALE. — Differs from the female as follows: Eyes protruding as 

 far as or farther than the cheeks; mandibles brighter in color; antennas 

 with 15 segments; the abdomen small and slender; the wings less smoky; 

 areolet somewhat smaller, radial cell somewhat less open; length 1.7- 

 2.7 mm. 



GALL. — Mossy, containing a compact or agglomerated cluster of 

 woody cells. Filamentous covering 4.0-8.0 mm. thick, probably green 

 and reddish when young, becoming brown and blackened with age; 

 filaments attached to a more or less compacted cluster of larval cells, 

 each cell sub-spherical, 2.0-4.0 mm. in diameter, with woody but not thick 

 walls, entirely hollow within. On the twigs, usually terminally, of 

 Rosa nutkana. 



