REPORT OF THE STATE ENTOMOLOGIST IOI4 237 



bbbbb Antennae with 12 segments 



c Antennal stem with a length three-fourths that of the basal enlargement 

 d Abdomen and mesonotum dark brown; palpi uniarticulate; male; 



reared from gall on Audibertia audibertiae Felt, C. 1029 



dd Abdomen deep fuscous orange; palpi biarticulate ; reared from petiole 

 or bud gall on chestnut castaneae Felt, C. ai7i6 



Rhopalomyia crassulina Ckll. 



1908 Cockerell, T. D. A. Can. Ent., 40: 89 



This dark brown species was reared early in October 1907 from 

 sessile galls on the branches of Aster crassulus taken at 

 Rydberg in Boulder, Col. 



Gall. Length 7 mm, short, oval, " densely covered with white 

 hair and appearing something like small, green peaches." These 

 galls are sessile on the branches, often two placed side by side. 



Male. Length 1.5 mm. Antennae three-fourths the length of 

 the body, sparsely haired, dark brown; 18 segments, the fifth with a 

 stem three-fourths the length of the basal enlargement, which latter 

 has a length nearly twice its diameter; terminal segment produced, 

 with a length about four times its diameter, tapering, obtuse. Palpi; 

 the first segment short, stout, narrowly oval, with a length nearly 

 twice its diameter, the second short, stout, broadly oval. Mesonotum 

 dark brown, submedian lines sparsely haired. Scutellum and post- 

 scutellum yellowish. Abdomen dark brown, basally and the distal 

 segment lighter; membrane and plurae yellowish. Genitalia fuscous. 

 Wings hyaline, costa light brown; halteres pale yellowish. Legs 

 mostly fuscous yellowish ; femora darker apically , the tarsi somewhat 

 lighter than the tibiae. Genitalia; basal clasp segment short, 

 stout; terminal clasp segment very short, stout. Other organs 

 indistinct in the preparation. Cecid. ai82 5. 



Described from a specimen kindly contributed by Prof. T. D. A. 

 Cockerell. 



Rhopalomyia cockerelli n. sp. 

 Three males referable to this species were received February 16, 

 1908 from Prof. T. D. A. Cockerell of Boulder, Col. They are 

 labeled: " September 29, on window, probably from heads of 

 Senecio or Aster." 



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

 sparsely haired, dark brown; 19 segments, the fifth with a stem 

 as long as the basal enlargement, the latter subglobose, with a length 

 a little greater than its diameter; terminal segment produced, 

 narrowly oval, with a length about three times its diameter. Palpi; 

 one segment with a length over twice its diameter, tapering, narrowly 

 rounded. Mesonotum reddish brown, the submedian lines fuscous 

 yellowish, sparsely haired. Scutellum fuscous yellowish, with a 



