56 INSECUTOR INSCITI^ MENSTRUUS 



and wild grape. The species is probably predacious, and its 

 occurrence on the above plants of little import. Described 

 from Plummer's Island, 



Superfamily THRIPOIDEA Hood 

 Family HETEROTHRIPID^ Bagnall 



4. Heterothrips ariscsma Hood. — April 19- June 8; both 

 sexes common in flowers of Jack-in-the-pulpit {Ariscema tri- 

 phyllum L.) and green dragon {A. dracontium h.). Known 

 previously from Illinois, Florida, Tennessee, and Virginia. 



5. Heterothrips vitis Hood. — May 19- June 6 ; abundant in 

 flowers of wild grape, smilax, and poison ivy (Rhus toxico- 

 dendron L.)- Known from Maryland, Virginia, and the Dis- 

 trict of Columbia. Plummer's Island is the type locality. 



Family THRIPID^ Uzel 



6. Chirothrips manicatus Haliday. — June 8; both sexes, 

 taken by sweeping grass. A European species, recorded in 

 North America from Massachusetts, Florida, Tennessee, Iowa, 

 Nebraska, Oregon, and British Columbia; occurs also in New 

 York, Pennsylvania, Maryland, Virginia, Illinois, and Kansas 

 (coll. Hood). Often very abundant in the flowers of various 

 grasses and cereals. 



7. Limothrips cerealium Haliday. — June 8; two females, 

 taken by sweeping grass. A European species, recorded in 

 the United States from Pennsylvania, Massachusetts, Tennes- 

 see, and Florida; occurs also in Virginia, Maryland, District 

 of Columbia, Indiana, Illinois, Texas, and Kansas (coll. 

 Hood). Probably feeds exclusively on grasses and cereals. 



8. Frankliniella nervosa (Uzel). — July 27-September 14; 

 two females taken in sweepings from grass. Originally de- 

 scribed from Bohemia; recorded in the United States from 

 Massachusetts, Iowa, and Tennessee, but occurring also in New 

 York, Pennsylvania, Maryland, Indiana, and Illinois (coll. 

 Hood). It may be well to call attention to the fact that ner- 

 vosa was found by Uzel in Bohemia, in the first spring flowers, 

 while the American species, described one year later as Thrips 



