NORTH AMERICAN THYSANOPTERA— HINDS. 1 89 



Color nearh' uniform brown; three and ba.se of four y<>ll()wish 

 brown; spines short and weak; sense cones short and bhmt. 



Prothorax one-half as long as breadth to outer ang-les of coxa>; 

 front and hind edges nearly parallel, g-ently curved; one short spine 

 at each posterior angle and one nearly halfwa}' between this and 

 middle of hind edg-e. Mesothorax somewhat wider than prothorax 

 but usually less than twice as wide as the head; sides of pterothorax 

 nearly straight, shorter than its breadth. Legs short and moderately 

 stout; fore femora but slightly thickened; fore tarsi armed with a 

 tiny tooth near tip within; middle and hind tibite with one prominent 

 spine ext(!rnally at tip. Legs In'own; middle and hind tarsi slightly 

 yellowish, sometimes ]>rown; fore tarsi and tip of tibia? yellow. 

 Wings always present, narrower in middle than at ends, shaded with 

 brown onl}' at base, where fore wing bears three erect spines. Wings 

 and fringes nearly equal; fringes single, except on hind border of fore 

 wing near tip, where for seven or eight hairs they are doul)le. 



Abdomen about twice as broad as head, averaging about two and 

 one-half times as long* as wide; segments overlapping somewhat; sides 

 nearly parallel to middle, then tapering gradually to base of tube. 

 Tube about four-tifths as long as head, only slightly tapering; sides 

 straight; terminal spines shorter than tube. All spines on abdomen 

 short, weak, and not conspicuous. 



Redescribed from seven specimens. 



Male unknown. 



Food 2}lanU. — Achillnt rruUefolium^ ox-e3"e daisy, red clover, white 

 clover, various grasses. 



Hah! tat. — Iowa, Michigan, Massachusetts. 



ANTHOTHRIPS VERBASCI (Osborn). 

 Plate VII, figs. 76-78. 



OsBORX, Ins. Life, I, 1888, pp. 137-142. 



Phlceothrips verbasci Osborn, Proc. Iowa Acad. Sc, III, 1896, p. 228. 



Female. — Length 1.8 mm. (1.42 to 2.12 mm.); width of mesotho- 

 rax 0.38 mm. (0.32 to 0.11 mm.). General color dark brown. 



Head but slighth% if any, longer than wide; cheeks nearh* straight 

 and parallel, set with few minute spines; post-ocular bristles prom- 

 inent; hind margin of head not covered by front margin of prothorax. 

 E3*es linely and closel}* faceted, rounded, not protruding; ocelli 

 wideh" separated, posterior ones contiguous with the light margins 

 of eyes; front ocellus placed at extreme vertex. Mouth cone about 

 as long as it is broad at base, pointed. Antenna? approximate, almost 

 twice as long as head; relative lengths of segments: 



1 ^ ^ ^ 5 6 7^ _8_ 

 9 12 15 15 15 11 12.6 10.6 



