OF WASHINGTON, VOLUME XIV, 1912. 135 



Measurements of holotype: Length 1.26 mm.; head, length 0.102 mm., 

 width 0.167 mm.; prothorax, length 0.143 mm., width 0.208 mm.; mesotho- 

 rax, width 0.288 mm.; abdomen, width 0.300 mm. Antennul segments: 

 1, 30 M ; 2, 44 M; 3, 58 M; 4, 48 M : 5, 40 M ; 6, 56 M; 7, 9 M ; 8, 16 M; total length 

 of antenna, 0.30 mm.; width at segment 4, 0.023 mm. 



Described from 8 females, taken in flowers of Viburnum 

 acerifolium L. and Chwnanthus riri^iniru L., on Plummer's 

 Island, Maryland (in the Potomac River near Washington, 

 D. C.), May 19, 1912, by W. L. McAtee and the writer. 



This pretty species seems to be more closely allied to the 

 African F. schnitzel (Trybom) than to any other, resembling 

 it in that the head is narrowed behind and the eighth anten- 

 nal segment conspicuously longer than the seventh. The color- 

 ation of the body and antennae, however, will readily dis- 

 tinguish the two. In North America it finds its closest rela- 

 tive in F. insnlaris (Franklin), but the antennal structure, 

 as well as the coloration of body, legs, wings, and antennae, is 

 decidedly different in that species. 



Heliothrips punctipennis, new species. 



Fetnale. Length about 0.97 mm. General color dark blackish brown to 

 nearly black, with head and thorax distinctly paler and of a brownish yel- 

 low color, abdomen with last three segments pale; legs clear lemon yel- 

 low; antennae grayish white, 1, 2, and 6-8 darker. 



Head about 1.2 times as wide as long and slightly longer than prothorax; 

 cheeks slightly arcuate; dorsal surface rather conspicuously reticulate, 

 roughened between the lines of reticulation; frontal costa distinctly nar- 

 rower than first antennal segment; vertex subcarinate in front of ocelli. 

 Eyes about 1.5 times as long as their distance from posterior margin of 

 head, scarcely protruding, setose. Ocelli of normal form and position. 

 Antennas twice as long as head; segment 1 subquadrate; 2 broadest in 

 entire antenna, a little longer than wide; 3 and 4 urn-shaped, the former 

 little less than twice as long as wide; 5 egg-shaped, pedicellate; 6 and 7 

 ' together of same form as 5, but inverted; 8 very long and slender. Segments 

 1, 2, ajid 6-8, brown, the first paler; intermediate segments nearly clear 

 white, slightly clouded with brownish toward apex. Maxillary palpi two- 

 segmented. 



Prothorax about 1.7 times as wide as long, slightly shorter than head, and 

 with similar reticulation; bristles few, short and well distributed, a more 

 prominent pair near middle of anterior margin. Pterothorax somewhat 

 broader than prothorax; membrane yellow, plates brown. Wings long, 

 very slender, overreaching the abdomen; fore wings about eighteen times 

 as long as width at middle, of normal venation; costal margin with about 

 19 bristles; principal vein with four colorless bristles, of which two are near 

 base and two near fork; anterior vein with one bristle near base and two 



