REPORT OF THE STATE ENTOMOLOGIST I913 200, 



Diarthronomyia californica Felt 

 1912 Felt, E. P. Pomona Coll. Jour. Ent., 4752 

 The midge was reared from subconic leaf galls on Artemisia 

 californica, Claremont, Cal. 



Diarthronomyia artemisiae Felt 



1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 339-40 



The species described below was reared June 16, 1883 from galls 

 on sage bush, Artemisia tridentata, collected by Law- 

 rence Bruner at Fort Garland, Col. This species approaches 

 Rhopalomyia tridentatae Rubs, though it differs there- 

 from in the greater number of antennal segments, the longer stems 



Fig. 33 Diarthronomyia artemisiae, fifth antennal segment, 

 male (enlarged, original) 



in the male flagellate segments and in the absence of what might be 

 termed three whorls of hairs. There appears to be no description 

 of the gall. 



Male. Length 2 mm. Antennae nearly as long as the body, 

 thickly haired, yellowish brown; 18 segments, the fifth with a stem 

 about three-quarters the length of the subcylindric basal enlarge- 

 ment, which latter has a length twice its diameter; terminal seg- 

 ment greatly produced, with a length about four times its diameter, 

 narrowly rounded apically. Palpi ; first segment prolonged, swollen 

 distally, with a length twice its diameter, the second short, stout, 

 narrowly rounded apically. Mesonotum dark reddish brown, the 



