Jan., '09] ENTOMOLOGICAL NEWS. 3! 



bristles blunt, much shorter than eyes. Eyes large, prominent, finely 

 faceted, not bulging. Antennae twice as long as head ; segments i and 2 

 concolorous with body, excepting apex of 2, which is paler apically; 

 3 and 4 nearly uniform bright yellow; 5 usually with basal half yellow; 

 remainder of antenna dark backish brown; sense cones slender, scarcely 

 visible ; formula* : 3, o - i ; 4, i - 2; 5, i i + i ; 6, i i -f i ; 7 with one 

 on dorsum near apex. Mouth cone long, slender, surpassing base of 

 prosternum. 



Prothorax about half as long as head, and (including coxae) nearly 

 three times as wide as long; all spines present, blunt, the pair at the 

 posterior angles longest. Pterothorax large, heavy, slightly wider than 

 long, and wider than prothorax; sides nearly parallel, roundly con- 

 verging posteriorly and anteriorly. Wings present, about attaining base 

 of tube ; fore wings black in basal half, of equal width throughout, and 

 with the sub-apical fringe on posterior margin double for about thirteen 

 hairs. Legs moderately slender, black; fore tarsi unarmed. 



Abdomen large, slightly wider than pterothorax, tapering roundly 

 from segment 6 to base of tube. Tube about .6 as long as head, taper- 

 ing evenly from base to apex. 



Measurements : Total length 1.94 mm. ; length .27 mm. ; width .21 

 mm. ; prothorax, length .14 mm., width (including coxae) .37 mm. ; 

 pterothorax, width .45 mm.; abdomen, width .51 mm.; tube, length .18 

 mm., width at base .082 mm., at apex .041 mm. Antennae: I, about 

 30^; 2, 6o/j.- 3, 90^; 4, 82^; 5, 75^; 6, 68^; 7, 57^; 8, 35/1; total .52 mm.; 

 width 37^. 



Male. Similar to female but smaller and more slender (length about 

 1.7 mm.). 



Described from many specimens of both sexes, from the fol- 

 lowing localities : Illinois Bosky Dell, Carbondale, Dubois, 

 Pulaski, on various species of oak (L. M. Smith) ; Michigan 

 Baldwin, on white oak (J. D. H.). 



This species is intermediate in structure between Liothrips 

 (?) ocellatus m.f and Phyllothrips citric ornis m.$ It may 

 readily be distinguished from its congeners by means of the 

 following key : 



A. Head not more than 1.3 times as long as wide (Fig. 3). 

 a. Forewings brownish at extreme base; head about 1.15 times as long 

 as wide ; marginal abdominal bristles yellowish ; tube .8 as 

 long as head P. (?) ocellatns m.f 



*See note on first page of this Article. 



fBull. 111. State Lab. Nat. Hist., Vol. VIII, Art. II, p. 375; 1908. 



JCan. Ent., Vol. XL. No. 9, p. 305, Fig. 15; 1908. 



