154 pROCEEDINOS OF THE NATIONAL MUSEUM. vol. xxvi. 



Remarl-s. — This species is very similiir to Knflir!ps iritlci (Fitch), 

 but it has a loii»-cr though more retracted head, whicli is also sliuhtly 

 wider; the terminal segment of the antenna is one and three-lifths , 

 times as long as seven; spines on body stouter and more prominent, j 

 Both Enthrijj.H tritici and Euthrij).^ occidentidis approach very closely j 

 to Fliym^yus nigrmentrh Uzel. 



EUTHRIPS FUSCUS, new species. 

 Plate IV, figs. 40, 41. 



Female. — Length 0.93 mm. (0.70 to 1.08 mm); width of mesothorax 

 0.21 mm. (0.18 to 0.24 mm.). General color brown. In dark speci- 

 mens the abdomen is blackish })rown; in light specimens the general! 

 color is yellowish brown. ■ 



Head about one and one-half times as wide as long, about one-fourth 

 retracted into prothorax ; occiput deeply wrinkled transversly; ante- 

 rior margin of head slightly and smoothly elevated in middle; cheeks 

 straight and parallel. Eyes moderately large, occupying together 

 about one-half the width of the head, dark, slightly protruding; 

 margins pale yellow; ocelli smaller than facets of eye, pale yellow, 

 margined with dark red, widely separated, posterior ones contiguous 

 with yellow margins around eyes; one stout spine in front of each 

 posterior ocellus. Mouth cone short and tapering abruptly; maxil- 

 lary palpi slender, three segmented. Antenna? inserted a little below 

 the margin, about three times as long as dorsal length of head; 

 relative length of segments: 



12 3 45678 



5.5 8.8 10.4 10.2 9 11.7 2.3 3.8 



First segment rounded, one-third broader than long; two is cup- 

 shaped; three to six subequal in thickness; three to five somewhat 

 clavate; three with very slender peduncle; six cylindrical-ovate. 

 Antenna^ quite uniformly brown (sometimes three, four, and five 

 lighter gray-brown, especially at bases), only segment three somewhat 

 more yellowish; spines on segments tw^o to five quite stout and dark 

 colored. Color of head uniform grajdsh to orange-brown. 



Prothorax fully one and one-half times as wide as long and one and 

 two-tifths times as long as the head; sides arched; angles rounded; 

 wider l)ehind than in front; one large curved spine at each anterior 

 angle and another on anterior margin between this and the median 

 line; two stout spines at each posterior angle, the inner one of which 

 IS much the weaker; also a stout spine on the posterior edge between 

 the pair and the median line; other spines on prothorax small and not 

 conspicuous. Mesothorax but very little wider than the prothorax; 

 piojeeting prominences at anterior angles; mesouotum broad, without 



