REPORT OF THE STATE ENTOMOLOGIST I907 38 1 



acta Abdomen dull red; wings small, narrow; scutellum reddish yellow; 3d 

 antennal segment with a length 2^/^ times its diameter; female, bred 



from warty, reddish brown leaf gall on oak leaf 



(Cecidomyia) pilulae Walsh, C. 811, 814, 850, 1046, 1105 

 oaaa Abdomen yellowish 



b Abdomen yellowish brown; wings small, broad; antennal segments 



with 6 to 7 circumfili ; male, swept from sumac 



(O 1 i g o t r o p h u s) r h o i n a Felt, C. 94 

 ■ bb Abdomen pale yellow, wings rather small, medium width, 5th an- 

 tennal segment with 7 circumfili, finely reticulate, length 2.5 mm, 

 male; bred from slight blister swelling on lateral veins of red 



oak leaves a m e r ic a n a n. sp., 31792 



bbb Abdomen pale orange; wangs large, narrow; scutellum pale yel- 

 lowish; 3d antennal segment with a length 3^/^ times its diameter; 



female (Asphondylia) sobrina Felt, C. Iic8 



bbbb Abdomen reddish yellow; wings large, broad; scutellum fuscous 

 yellowish ; 3d antennal segment with a length 2y2 times its 

 diameter ; female c o n n e c t a n. sp., C. 822 



DIPLOSARIAE 



The members of this tribe are easily distinguished by the long, 

 slender, thickly haired, 14 segmented antennae, the flagellate segment 

 being binodose and usually provided with tv/o or three circumfili. 

 The palpi vary from uniarticulate in a European form, to quadri- 

 articulate. The third vein may unite with the margin well before 

 the apex, as in Arthrocnodax, or at or well beyond, as in some other 

 species. The claws are simple or toothed. This group presents 

 some exceedingly interesting variations, not only in antennal but 

 also in genitalic structures, the latter presenting extreme diversity. 

 Owing to time limitations it has not been possible up to the present 

 to prepare keys for the separation of the females. 



The members of this group appear to live largely in the more 

 lender, leafy or bud tissues, though a considerable number are in- 

 quilines. while a few live upon fungus or are zoophagous. 



HOSTS, HOST PLANTS AND GALLS OF THE DIPLOSARIAE 



Agrimonia (agrimony) 

 Bred from florets C o n t a r i n i a a g r i m o n i a e , C. 31696 



Amelanchier (shadbush) 

 Bred from truncate leaf gall. . . .H r m o m y i a canadensis, C. 31758 



Apis (bee) 

 Bred from hive debris Arthrocnodax apiphila, C. ai77S 



