ART. 18. NOTES ON CYNIPID WASPS WELD. 13 



tibia longer than tarsus, second shorter than fifth; chiw with large 

 tooth. Fore wing reduced, reaching beyond second tergite, about 3.5 

 times as long as broad ; venation normal but without areolet ; surface 

 pubescent ; margin ciliate. Abdomen smooth, polished, longer than 

 head and thorox, longer than high, somewhat compressed; second 

 tergite occupying 0.6 with large white pubescent areas reaching its 

 hind margin on sides. Ventral spine truncate, broadest at apex, very 

 hairy; ovipositor when dissected out a little longer than antenna. 

 Using width of head as a base, the length of mesonotum ratio is 0.96 ; 

 antenna, 2.5 ; ovipositor, 2.8 ; wing, 1.85. 



Range in length of 19 pinned specimens, 2.8-4.9 mm.; average, 

 3.9 mm. 



Closest to lanaeglohuU Ashmead, a lighter colored species, whose 

 wing does not reach middle of second tergite and whose venation is 

 far less complete. 



Type.— C?it. No. 24679, U.S.N.M. Type and 15 paratypes. 



Host. — Quercus lyrata. 



Gall. — Globular, 15-20 mm. in diameter, produced on the under 

 side of leaves and dropping to the ground in the fall. In appear- 

 ance and structure they resemble the much smaller galls of Philoni-x 

 nigra (Gillette). 



llahitat. — The type galls were collected at Hoxie, Arkansas. Seven 

 flies emerged December 1, 1917; three December 18, 1917; and two 

 March 24, 1919. From galls collected at Poplar Bluff, Missouri, 

 three adults were cut out November 16, 1917. 



KEY TO DESCKIBED SPECIES OF ACRASPIS. 



1. Sides of all the tergites pubescent, a narrow median dorsal stripe bare 2. 



Pubescence on abdomen confined to usual patches on sides of second tergite 



or at most to second and third 5. 



2. Mesonotum at least as long as width of head (ratio 1.0). Hind tarsus 



shorter than tibia. Wing broadest in distal half 3. 



Mesonotum length 0.85-0.90 width of head. Hind tarsus as long or longer 

 than tibia. Wing lanceolate not distinctly wider in distal half 4. 



3. Wing more than twice as long as scutellum, longer than width of head. Seg- 



ment 3 of antenna not longer than 1 and 2. Lateral lines bare and shining. 



Colorado alaria, new species. 



Wing less than twice scutellum, not as long as width of head. Segment 3 of 

 antenna longer than 1 and 2. Mesoscutum uniformly pubescent, lateral 

 lines not bare of shining villosa Gillette, 



4. Mesoscutum length not over 0.9 width of head. Propodeum without a median 



carina. Pubescence between parapsides denser than on adjacent scutellum. 

 Parapsidal grooves distinct but short. Disk rugose behind. Q. macrocarpa. 

 macrocarpa Bassett (=undulata Gillette). 

 Mesoscutum ratio over 0.9. Propodeum with a median carina. Pubescence 

 between parapsides as sparse as in base of scutellum. Parapsidal grooves 

 very fine and short. Disk coriaceous behind. Gail on chestnut oaks. 



hirta (Bassett). 



