72 



Indiana University Studies 



puncto-rugose, naked except for a short pubescence on the face. An- 

 tennae black, the two or three basal segments brighter; with 13 (or 14) 

 segments, the second globose, only slightly elongate, the third distinctly 

 longer than the fourth (or more than twice the length of the fourth if 

 there are only 13 segments), the last only slightly longer than the pre- 

 ceding. THOEAX: Entirely black; mesonotum rather irregularly 

 rugose, most rugose posteriorly between the parapsidal grooves and 

 antero-laterally ; parapsidal grooves distinct for two thirds the mesonotal 

 length, anteriorly entirely lost in the rugose areas; median groove 

 almost lacking; anterior parallel lines evident but not prominent, rather 

 narrow; lateral lines fine, in a smoother area; scutellum longer than 

 wide, well rounded posteriorly, rugose, anteriorly depressed especially 

 laterally but without foveae; pronotum rugoso-striate laterally; meso- 

 pleurse rugose, with a large, smoother, shining, coriaceous area, smooth- 

 est ventrally, crossed by a broad, transverse, rugose area. ABDOMEN: 

 Darker posteriorly, practically entirely smooth, shining, and naked; 

 elongate, much further produced dorsally, edges of segments very oblique, 

 the second segment covering three quarters or more of the whole area; 

 hypopygium plow-shaped, without a further spine. LEGS: Punctate, 

 scatteringly hairy; tarsal claws fine, with a bare suggestion of a tooth, 

 WINGS: With the margins short ciliate; largely smoky; veins heavy; 

 the areolet of moderate size to large; the cubitus not quite reaching the 

 basalis ; the radial cell open, or closed by a thickening which is not a 

 continuation of the subcostal or radial veins, cell short, broad, the sec- 

 ond abscissa of the radius strongly curved; the first abscissa arcuate- 

 angulate; radial cell especially smoky on the bounding veins, clearer 

 centrally. LENGTH: 2.5-3.7 mm. 



MALE. — Differs from the female as follows: Antennae wholly 

 black; abdomen black, small, elongate; cloud on veins of radial cell 

 almost or wholly lacking; radial cell more or less closed. 



GALL. — Irregularly ovate, smooth, solid, leaf gall. Polythalamous, 

 each gall with usually three or four larval cells. Very irregular in 

 shape, globular, to ovate, elliptical, or massive, all edges rounded; aver- 

 aging 10. by 20. mm., observed to 25. mm. in diameter; smoothed, naked 

 of bloom or scurf, light to rich brown (in mature galls). Internally 

 solid, compact, soft, like compacted sawdust; the larval cells large, 2.0- 

 3.5 mm. in diameter, more round than usual, with a distinct but thin 

 and inseparable lining. On roses, attached to leaves, or replacing leaf- 

 lets, or replacing the whole leaf and attached directly to stems. 



RANGE. — From Texas and Wyoming to Washington. A very 

 closely related species, Dijjlolepis ignota (O. S.), extends over the eastern 

 half of the United States. 



I have not seen the insects of this species which have been 

 recorded from Texas (according to Beutenmuller) , Wyoming, 

 or Washington, altho I have seen the galls of the Wash- 

 ington material. Undoubtedly these regions as well as others 

 in the western part of the United States have varieties dis- 

 tinct from any yet described. What data have been over- 



