20(> PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvi. 



Prothorax small, scarcely two-third,s as long- as head. One spine at 

 each posterior angle alone prominent; those at fore angles smaller 

 than the anterior marginals; all indistinct; midlaterals wanting; pos- 

 terior marginals small and not visible except on lightest specimens 

 with careful focusing. Pterothorax approximately as wide asahdomen; 

 its sides nearly straight and parallel. Wings present; hind fringe of 

 fore wing double for five or six hairs near tip. Legs long and sleri- 

 der; fore coxie projecting strongly; fore femora scarcely thickened |i 

 and tarsi unarmed; one spine near base of each fenuir belovv much | 

 longer than others on legs and longest on for(>, femora; legs concol- 

 orous with l)ody. 



Abdomen long and slender, cylindrical to about seventh segmentJ 

 about twice as wide as head, from seventh segment tapering ([uite , 

 gradually to tube. Tube short, only one half as long as head; its sides I 

 straight and converging slightly; width at n)iddlc about one-third 

 width of head; terminal hairs at)out as long as tube. Spines at sides, 

 of abdomen slender, pale, and not very prominent; segments usually 

 overlapping considerably; sides darkest in color. 



Described from eight females. 



6%^>6^.— Cat. No. '6336, U.S.N.M. 



Male. — Male about five-sixths as large as female, though antenna' 

 are (>f about same size in both sexes; relative lengths of segments as 

 follows : 



1 ^ ^^ ^ ^6 ]_ ^ > 

 8 12 16.5 16 13 12.5 11 8 



Abdomen nmch smaller than in female and tapering gradually from 

 base to tip. 



Described from one specimen. 



Food plant. — Grape. 



llahltat. — Amherst, Massachusettso 



Genus IDOLOTHRIPS Haliday. 



.1 

 Anterior ocellus remote from the base of the antennw. Proboscisi 



reaching the base of the prosternura; lal)ial palpi papiliform; vein 



one of the fore wings shortened by one-half or abbreviated. Head 



very long, rounded; abdomen hollowed out. Antenmc slender, three 



or four times as long as the thorax; prothorax unequally tuberculated; 



metatarsi unarmed. Size large, marked with three or more lines. 



In this genus I find only the species conffcrarmii. 



IDOLOTHRIPS CONIFERARUM Pergande. 



Plate X, tigs. 307-110. 



Idolothrips coniferarum Pergande, Entom. News, YII, 1896, pp. 63-64. 

 Idolothrips coniferarum Trybom, Festskrift for Lilljeborg, 1896, p. 218. 



« This generic description is translated from Haliday's original description. 



