84 Bulletin of the Brooklyn Entomological Society Vol. XVI 



Described from numerous females collected from willow and 

 Viburnum alnifolium at Cranberry Lake, N. Y., July, 1919 and 

 1920, by Prof. Carl J. Drake. 



Type in the author's collection; paratypes in the National Mu- 

 seum, in the collection of the Brooklyn Entomological Society, 

 and that of the N. Y. State College of Forestry. 



Idolothrips fuscus n. sp. 



General color dark brown, with much bright red hypo- 

 dermal pigmentation on thorax and abdomen. Measure- 

 ments: Total body length about 4 mm. (3.5 to 4.6 mm.) ; 

 head — length 0.61, breadth 0.29; prothorax — length 0.16, 

 breadth across the coxae 0.52 ; pterothorax — greatest breadth 

 0.63; abdomen — greatest breadth 0.64; tube — length 0.55, 

 width at base o.i 15, at apex 0.07 mm. Antennae — total length 

 0.66 mm. 



Segment i 2 3 4 5 6 7 8 



Length y2 82 168 145 137 114 64 70 



Breadth 55 45 50 52 47 44 36 23 microns.' 



Head a little over twice as long as broad ; cheeks nearly 

 straight and parallel, but bulging a trifle near the base, con- 

 traction at the extreme base and behind the eyes barely per- 

 ceptible, roughened with numerous short wart-like swellings 

 and sparsely provided with medium-sized bristles; dorsal 

 surface minutely striated ; post-ocular bristles situated far 

 behind the eyes, longer than the eyes but pale and incon- 

 spicuous, an equally long bristle in front of each posterior 

 ocellus ; other bristles short ; eyes small, not protruding, dark, 

 facets small, distance across the eyes the smallest diameter 

 of the head except for a minute constriction immediatel)^ be- 

 hind them; ocelli small and inconspicuous, anterior one situ- 

 ated on the projection between the bases of the antennae, 

 posterior pair opposite the middle of the eyes and close to 

 their margins ; mouth cone short and rounded, reaching about 

 the middle of the prosternum; antennae almost uniformly 

 brown, nearly as dark as the head, apex of segment 2 a little 

 lighter brown, extreme apices of segments 3-5 very light 

 yellow, almost colorless ; segment i cylindrical, 2 cup-shaped, 

 constricted to a wide "neck" above the base and curved out- 

 ward, 3-5 clavate, 6 and 7 sub-cylindrical, their apices ex- 

 tended over the bases of the segment in front, 8 lanceolate, 

 bristles brown, rather long, sense cones colorless, rather 

 short. 



