130 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



extreme base, across the scale, and to the tip of the wing, sometimes show- 

 ing a tendency to form a transverse band just beyond the basal third; 1 

 hind wings white or grayish. Legs normal to genus, the fore femora slender. 



Abdomen slender, normal to the genus. 



Male. Length about 1.1 mm. Fore wings with a transverse black band 

 just beyond the basal third, in addition to the longitudinal band on pos- 

 terior half. Abdomen very slender; ninth segment nearly as long as wide, 

 narrowed toward apex, and without clasping organs. 



Measurements of holotype: Length 1.48 mm.; head, length 0.180 mm., 

 width 0.197 mm.; prothorax, length 0.148 mm., width 0.218 mm.; mesotho- 

 rax, width 0.320 mm; abdomen, width 0.342 mm. An tennal segments : 1,36 /z; 

 2, 50 M; 3, 114 M ; 4, 87 /*; 5, 58 /*; 6, 12 M ; 7, 13 M ; 8, 13 yu; 9, 11 M; total 

 length of antenna, 0.39 mm.; width at segment 4, 0.026 mm. 



Described from 10 females and 8 males, taken on honey 

 locust (Gleditsia triacanthos L.),at Topeka, Illinois, May 23, 

 1909, and August 7, 1908, by Mr. Charles A?Mart,and one 

 living female from Washington, D. C., July 28, 1912, J. D. 

 H., on yellow locust (Robinia pscudacacia L.). 



Type locality : Topeka, Illinois. 



In the coloration of the wings, this species resembles ^E. 

 vittatus Haliday and ^E, kuwanaii(&\v !) Moulton, which occur, 

 respectively, in Europe and the Pacific coast region of. North 

 America. From both it may be known by the longer head, 

 shorter prothorax, and the details of wing coloration. In ad- 

 dition to these characters, it is also to be noted that in ku- 

 ivanaii only the third antennal segment is white, the spine- 

 bearing sense area on the ventral surface of the fifth antennal 

 segment is circular in form, the head is not emarginate in front, 

 and, rhost important of all, the ninth abdominal segment of 

 the male is provided with lateral claspers. 



^olothrips crassus, new species. (PI. IV, figs. 5, 6.) 



Female. Length about 1.5 mm. Color dark blackish brown, w.th a 

 reddish cast, due to crimson hypodermal pigmentation in the thorax ab- 

 domen, and femora; antenna) with segments 3 and 4 pale yellowish wkite, 

 the latter blackish at extreme apex. 



Head about 1.3 times as wide as long, about as long as prothorax, not 

 transversely striate, and with minute spines on occiput and cheeks; an- 

 terior border not deeply emarginate by a forward prolongation of (he 

 eyes, and without median tubercle; cheeks slightly swollen. Eyes moderate 

 in size, prolonged as usual on ventral surface of head, and with the mo:e 

 dorsal facets separated by a distance much less than their own diameter!. 

 Ocelli equidistant. Antennae nearly 2.5 times as long as head, unusually 

 stout; segment 3 about equal to 1+2 and only about three times as long as 



1 This band always finds its complete development In the male. 



