76 



Indiana University Studies 



Of 545 insects bred, 312, or over 57 per cent, are males. 

 These insects emerged at some date after collecting on April 

 18, 1920. 



This variety is very closely related to variety variahilis. 

 A discussion of the characters and ranges of the two is given 

 under variahilis. 



Diplolepis variabilis variety rufopicea, new variety 



FEMALE. — Shows the following' characters in addition to those 

 common to all varieties of the species: Mouthparts dark ruf o-piceous ; 

 basal segments of the antennae ruf o-piceous ; mesonotum very rugose 

 posteriorly between the parapsidal grooves; parapsidal grooves of mod- 

 erate width; scutellum very rugose, rather more depressed anteriorly 

 than in variety variahilis; abdomen mostly piceous black, rich brown 

 rufous basally; legs dark rufous brown, cox{e and hind femora and 

 tibiffi piceous black; wing veins dark brown; areolet of moderate size, 

 elongate on the cubitus ; cloud on veins of radial cell dark brown, almost 

 as heavy in places as the veins; length 3.2-3.7 mm. 



MALE. — Differs from the males of other varieties as follows: 

 Thorax more rugose; areolet of moderate size, elongate on the cubitus; 

 wing veins heavier, dark brown; length 2.7-3.5 mm. 



GALL. — Does not differ particularly from the galls of other va- 

 rieties. 



RANGE.— Colorado: Manitou. 



TYPES. — 4 females, 8 males, 18 galls. Holotype female, paratype 

 males, and galls at The American Museum of Natural History; para- 

 type adults and galls with the author; paratype males and galls at 

 Stanford University and the U.S. National Museum. Labelled Manitou, 

 Colorado; April 24, 1920; Kinsey collector. 



Most of the insects had emerged before collecting on April 

 24, 1920, but some large larvse were still in the galls and did 

 not mature until later. 



The insect of this variety is very distinct, to be recognized 

 with the naked eye as differing from the Utah varieties. The 

 gall is common in the Garden of the Gods at Manitou, and 

 must have been observed before this by entomologists. How 

 large an area of Colorado is covered by this variety I cannot 

 say definitely. Probably it is confined to a limited area east 

 of the Continental Divide. The Utah varieties and the variety 

 of the High Plains country of eastern Colorado are very 

 closely related, while rufopicea, occupying an intermediate 

 geographic position is remarkably distinct. This is strikingly 

 in accord with the geologic histories of the areas involved. 



