310 AMERICAN HYMENOPTERA. 



New Species of North American < "I \ 1 1*1 !>.!■'. 



BY H. F. BASSETT. 



Ten years ago I published an article in the Transactions de- 

 scribing forty one new species of gallflies. In that article I stated 

 that I had still a considerable number of undescribed species. 

 Since then some new species have been found, and some specimens 

 have been reared from galls I have long known, and it happens 

 that my paper contains descriptions of forty-one species, but the 

 number was not intentionally the same. 



I still have some material in hand, but it is doubtful whether my 

 studies of the Cynipidse will ever be carried any further. 



I trust the infirmity of failing eyesight has not prevented a fairly 

 good execution of a task at all times difficult ; but I gladly leave to 

 younger men a work that has for forty years had most of my leis 

 ure, and has always been an unfailing source of purest happiness. 



Autistroplius leavenworthi n. sp. 



The galls of this species are immense enlargements of the stalks 

 of some plant of the order Composite, probably of the genus Lac- 

 tuca or Mulgedium. 



My friend, Mr. F. Leavenworth, of Petersburg, Va., from whom 

 I received the specimens, informs me that larger galls occur than 

 those sent, though the largest of these measures between four and 

 five inches in diameter. They are unevenly globular. The flies 

 live over Winter in the galls. 



Gall-fly. — Male. — Body black. Antenna; fourteen jointed, first black; second 

 dark brown, globose ; third of moderate length, club shaped, the following joints 

 dusky reddish brown, all nearly equal in length. Head minutely punctate. 

 Collare very broad and with the mesothorax rather coarsely punctate. Parapsi- 

 dal grooves and a strong median line continuous from the collare to the scutel- 

 lum. Scutellum large and rugose. Fovse large, deep and smooth. Abdomen 



s tb. shining; first segment (second ?) two-thirds of the entire length. Legs 



very dark reddish brown. Wings hyaline. Veins pale, slender and absolutely 

 colorless throughout. Radial area open, broad. Areolet wanting. Body .12, 

 antennae .10, wings .11. 



Female. — Antennas thirteen jointed, thirteenth very long. Body in bulk con- 

 siderably larger than the male. Legs less dark. Female .14, antennas .10, 

 wings, .12. 



Three males and eighteen females in my collection. 



