1G4 Proceedings of the Biological Society of Washington. 



black, or with 4 yellow in basal third and along outer surface. Pro- 

 thorax about .55 as long as head and I inclusive of coxae) about 2.5 time- 

 as wide as long; all bristles present, Muni, dark in color. Legs black. 

 Wings of fore pair dark brown in basal ball"; posterior fringe double for 

 about 14 hairs. Abdomen moderately stout ; tube about .8 as long as 

 bead; abdominal bristles nearly black. 



Measurements of holotype. — Length 1.9mm.; bead, length ."-'.38 mm., 

 width .216 mm.; prothorax, length (along median dorsal linej .144 

 mm., width (inclusive of coxae) .360 nun.; pterothorax, width .420 

 mm.; abdomen, width .552 mm.; tube, length .204 mm., width at 

 base .090 mm., at apex .038 mm. Antenna! segments: 1, 33m; 2, 60m; 

 3, 81m; 4, 78m; 5, 78m; •>, 75m; 7, 62m; 8, 36m; total length of antenna, 

 .50 mm. ; width at segment 4, .039 mm. 



Male. — Much like female in color and structure, but smaller and more 

 slender. 



Described from fourteen females and two males taken on currant and 

 gooseberry at Bozeman, Montana (elevation 4,500 feet), June 8 and July 

 20, by Prof. R. A. Cooley and Mr. J. R. Parker. According to Professor 

 Cooley, the species is of some economic importance. 



Liothrips brevicornis sp. nov. 



Female. — Allied to citrieornis Hood. Color nearly black. Head about 

 1.4 times as long as greatest width; cbeeks almost straight, converging to 

 base; eyes not protruding, about .28 as long as head; postocular bristles 

 equal in lengtb to eyes, blunt. Antennae about 1.6 times as long as head; 

 segments 1 and 2 nearly black, the latter paler toward apex; 3 clear 

 orange yellow ; 4 brown, shaded with gray, darker on inner surface; 5-8 

 blackish brown, the pedicel of 5 paler. Prothorax about half as long as 

 head and (inclusive of coxa?) 2.6 time- as broad as lung; all bristles 

 present, blunt. Legs black. Wings of both pairs colorless; posterior 

 fringe of fore wings double for 18-25 hairs. Abdomen broad and heavy; 

 tube .8 as long as head and half as wide at apex a.- at base. 



Measurements oj holotype. — Length 2.04 nun.; head, length .336 mm., 

 width .236 mm.; prothorax, length (along median dorsal line) .156 

 nun., width (inclusive of coxae) .405 mm.; pterothorax, width .468 mm.; 

 abdomen, width .552 nun.; tube, length .276 mm., width at base .690 

 mm., at apex .645 mm. Antennal segments: 1, 42m; 2, 63m; 3, 99m; 4 ; 

 S7m; 5, 78m; 6, 75m; 7, 6'.)^; 8, 36m-; total length of antenna, .55 mm.; 

 width at segment 4, .039 mm. 



Described from several females taken by R. A. Cushman and the 

 writer on Sassafras sassafras at Vienna, Virginia, in April and May, 

 1913. 



Rhynchothrips (?) salicarius sp. nov. 



Female, forma brachyptera. — Color coal black. Dorsal surface roughly 

 sculptured, often with a deciduous whitish coating. Head about 1.1 



