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Indiana Vyiiversity Studies 



RANGE. — California: Descanso. Probably confined to the Cuya- 

 maca Mountains and their extensions into Lower California. 



TYPES. — 18 females, 32 males, 51 galls. Holotype female, paratype 

 adults, and galls at The American Museum of Natural History; paratype 

 adults and galls at Stanford University, the U.S. National Museum, and 

 with the author. Labelled Descanso, California; February 23, 1920; 

 Kinsey collector. 



Of the 50 adults, 64 per cent are males. Some of the 

 adults had emerged before collection on February 23, 1920, but 

 the galls still contained larvse which matured later. This 

 variety is an extreme development of the Tiibriderma- 

 sierrariensis series, extreme for instance in the reduction of 

 the median groove and of the areolet. 



Abnormal Galls of Dipiolepis tuberculatrix 



Rhodites neglecta Gillette, 1894 (gall). Can. Ent., XXVI, p. 158. 

 Rhodites neglectus Beutenmuller, 1907, Bull. Amer. Mus. Nat. Hist., 



XXIII, p. 639, pi. XLIV, figs. 7, 8. Thompson, 1915, Amer. Ins. 



Galls, pp. 22, 45. Felt, 1918, N.Y. Museum Bull., 200, p. 146, fig. 



152 (7, 8). Kinsey, 1920, Bull. Amer. Mus. Nat. Hist., XLII, p. 391. 

 Lytorhodites neglectus Kieffer, 1902, Bull. Soc. Metz, (2), X, p. 97. 



Dalla Torre and Kieffer, 1902, Gen. Ins. Hymen. Cynip., p. ,79; 1910, 



Das Tierreich, XXIV, pp. 722, 840. 



GALL. — Smooth, rounded stem enlargement. Polythalamous. Vary- 

 ing in size, usually smaller than the variety of tuhercidatrix involved; 

 the surface very smooth, only occasionally bearing some thorns and lines 

 as of an unopened bud, light straw yellow in color, spotted darker or 

 with black, becoming silvery gray upon aging. Internally rather more 

 corky than in normal galls of tuberculatrix, a dense cluster of many 

 larval cells arranged rather radiantly about the center, each cell small, 

 averaging 2.0 mm. or less in length, fifty or more cells often in a 

 cluster. The abnormal galls vary somewhat among the varieties of 

 tuhercidatrix, but are more uniform even than the normal galls of the 

 species. On roses of the several species. 



Gillette said of this gall : have long known what I sup- 

 pose to be the same gall in Michigan and Iowa, but never be- 

 fore succeeded in getting the gall-makers from them." He 

 described two females and one male, supposedly bred from a 

 single gall taken at Manitou, Colorado. Beutenmuller re- 

 corded the gall from Fort Collins, Colorado, and Pullman, 

 Oregon. I have the gall from practically every one of the 

 localities in which I collected normal galls of any variety of 

 tiibercidatrix, ranging thru California, Oregon, Utah, and 

 Colorado. Often both types of galls grow close together on 



