OF WASHINGTON, VOLUME XIV, 1912. 143 



Described from 4 females and 9 males, from Carbondale, 

 Pulaski, Riverside, and Urbana, Illinois, taken in May, June, 

 July, September, and October, by L. M. Smith, C. A. Hart, 

 and the writer. It occurs commonly under the loose scales of 

 the bark on wild cherry, though taken occasionally from 

 peach and sycamore. 



It is closely related to the species described by me asTric/io- 

 thrips hnjfce, but the smaller size, longer, stouter prothorax, 

 wider head, and stouter, differently colored antennae, should 

 distinguish it at once. Franklin's record 1 of the latter insect 

 for St. Anthony Park, Minnesota, may possibly refer to the 

 present species. 



Rhynchothrips dentifer, new species. (PI. VI, fig. 3.) 



Female (for ma macropf era). Length about 1.5 mm. Color dark black- 

 ish brown, nearly black; tarsi and intermediate antennal segments paler. 



Head slightly longer than wide, narrowest acrosseyes; cheeks subparallel, 

 roundly converging to eyes from middle, base with an abrupt but slight 

 collar-like widening; lateral and dorsal surfaces noticeably transversely 

 striate, sparsely, briefly, and scarcely visibly spinose; vertex slightly 

 rounded in front; postocular bristles truncate and slightly dilated at tip, 

 equal in length to eyes. Eyes one-third as long as head, slightly longi- 

 tudinally elongate as seen from above. Ocelli moderately small, situated 

 far forward; anterior ocellus overhanging; posterior ocelli opposite anterior 

 third of eyes. Antennae stout, slightly more than twice as long as head, 

 scarcely subreticulate; segment 1 scarcely broader than long; 2 rather stout, 

 about 1.5 times as long as wide; 3 stout, clavate, about twice as long as 

 wide; 4-6 oval, pedicellate, 1.66 times as long as wide, 4 broadest; 7 narrowed 

 apically, pedicellate, about twice as long as wide, truncate at apex and 

 broadly united to 8, which is sharply conical, not narrowed at base, and 

 twice as long as wide; segments 1 and 2 nearly concolorous with body, 2 

 paler toward apex; 3 brownish yellow, shaded with brown at sides and in 

 apical two-thirds; 4, 5, and 6 successively darker, with pale pedicels; 7 

 and 8 concolorous with body. Sense cones of moderate length, slender; 

 segment 3 with one on outer surface; 4 with one on inner surface, two on 

 outer, and a rudimentary one on dorsum near apex; 5 and 6 with one fully 

 developed cone on each side and an additional rudimentary subapical one; 

 7 with the usual long, dorsal cone near apex. Mouth cone very slender, 

 excessively long, fully a fifth longer than dorsum of head, reaching half 

 across mesosternum; labrum greatly surpassing labium. 



Prothorax very slightly shorter than head and (inclusive of coxse) about 

 1.8 times as wide as median length of pronotum, the latter with short me- 

 dian thickening; all spines present, dilated and truncate at tip, the two 

 pairs along posterior margin subequal and somewhat the longest. Ptero- 



1 Ent. News, Vol. XX, No. 5, p. 231. 



