160 Proceedings of the Biological Society of Washington. 
Ill 1895 I zol described the ineclianisni of tlie tarsal claws on j)ages 304 
and 305 of Ids “ Monograpliie, ” and figured the tarsus of tlie larva of 
Iricliotlirips copiosas on Tab. VIII, tigs. 152-155. One of Ids more 
pertinent sentences, freely translated from the Bohemian, is as follows: 
“ On the extremity, the tarsus of the fringe-wings has two movable claws 
which are strongly united to the dilation of the integument which is 
found between them.” It will thus lie noticed that the presence of such 
claws is an ordinal character instead of a specific one. 
The antenna, also, of tridentatus is misleadingly described and figured 
liy Shull, l>ecause observed in lateral aspect. The true form of the distal 
segments and the structure of the head and prothorax are shown in the 
figures given herewith. 
The species is common on various oaks, and has been examined by the 
writer from the following localities: Anna, Illinois, June 27, 1909, C. A. 
Hart; Boskydell, III., Oct. 21-23, 1908, L. 31. Smith; Carhondale, Ill., 
Oct. 15, 10, 1908, L. 31. Smith; Farrington, III., April 10, 1909, H. E. 
Ewing; 3Iarshall, Ill., Oct. 3, 1908, II. E. Ewing; 3Ionnds, Ill., Aug. 
9, 1909, J. 1). Hood; 3Iurphyshoro, 111., Nov. 0, 1908, L. 31. Smith; 
Pulaski, III., Oct. 27, 1908, L. 31. Smith, and 3Iay 29, 1909, C. A. Hart; 
Urhana, Ill., Nov. 15, 1907, R. D. Glasgow, Jan. 29, 1908, J. D. Hood 
and H. E. Ewing, June 9, 1909, C. Hart and F. D. Shohe; Baldwin, 
-Michigan, Aug. 15, 23, and 3,1, 1908, J. D. Hood; Wittenberg, 3Iissouri, 
July 12, 1909, C. A. Hart; Plummer’s Island, .Maryland (near Washing¬ 
ton, I). C.), April 0, 1913, J. I). H.; Cabin John, Md., June 8, 1913; 
Washington, 1). 0., June, 1913, J. K. Malloch and J. I). IF, reared. 
Liothrips caryae (Fitch). 
( Plate 4, fig. 0.) 
1850. Phheolhrips cart/ic Fitch, Third Kept. Nox. Ins. State N. Y., in 
Ann. Kept. N. Y. State Agr. Soc., vol. XVI, p. 445. 
This species, though occasionally referred to since its original descrip¬ 
tion, has virtually l)een lost to science for nearly sixty years. In Illinois 
and -Maryland I have found it commonly in May ami June on the leaves 
of hickory and in old, dried, phylloxera galls. The thrips are certainly 
not concerned in the making of the galls, and probably frequent them 
only to secure protection during metamorphosis. 
Fitch’s description, now out of print and very rare, is as follows: 
165. Hrcicouv Tukii’s, Phheothrips Cari/iv, new species. (Homoptera. 
Thripididm.) 
Slender coincal protuberances like the spur of a cock a quarter of an 
incji long, standing out perpendicularly from the under surface of the 
leaf aixl closed at their end, with a similar protuberance upon tbe opposite 
.side of the leaf having its end open and si)lit into several long slender 
teeth ; within these galls a small slender shining black insect with the 
middle joints of its antenme honey-yellow and its long narrow white 
wings appres.«ed to its back. 
Wbether tbe.se singular galls, wbich resemble a long slender pod thrust 
half way through the leaf, are produced by tbe Thrips found in them or 
by some other insect which forsakes them before this takes u]) its abode 
