lad THE CANADIAN ENTOMOLOGIST. 



I do not know what is the food plant of this species, the only speci- 

 men I have being caught on the leaf of a book I was reading in the Zoo- 

 logical Laboratory (fourth floor of building). It probably flew in at an 

 open window. Taken Aug. ii, 1882. 



Thrips tritici Fitch. Trans. N. Y. Ag. Soc. for 1855, page 540. 



Male, length .75-.80 m.m.,; width .20 m.ni. Female, length 1.10-1.20 

 m.m.: width .25 m.m. 



Color yellow, thorax tinted with orange ; antennae with dusky annu- 

 lations. 



Head from above nearly square, eyes occupying anterior angles. 

 Antennae approximate at base, joint 2, apical half of 4, and 6, dusky ; 

 joints 3 and 5 dusky at apex, the antennae api)earing annulated under low 

 power of microscojje. Head, thorax and abdomen with few stiff hairs. 

 Legs concolorous with body, all the tibiae with two spines at distal end, 

 distal joint of tarsi a little dusky, proximal joint of hind tarsi with two 

 spines. Wings narrow, hyaline, fringes whitish ; anterior wings have costal 

 fringe of shorter cilia^ than posterior ones, and the ciliae are intermixed 

 with shorter, stiffer, spiny hnirs, which at base replace the fringe ; two rows 

 of blackish spines on upper surfocc of wing corresponding to subcostal 

 and median veins. Posterior wings with no discal spines ; ciliae of 

 anterior edge shorter and more spiny than those of posterior. Both wings 

 have numerous rows of. very minute hairs on the surface. The males are 

 shorter and smaller than females, with wings reaching beyond the tip of the 

 abdomen instead of nearly to it, and there are some strong spines near the 

 tip of the abdomen. 



This species is the one most abundant in this locality, and the one 

 upon which most of my observations have been made. Dr. Fitch speaks 

 of the antennae as widely separated at base, and his figure (a very poor 

 one) makes them particularly so, which led me to think I had a distinct 

 species ; but Mr. Pergande has kindly compared my specimens with the 

 type and pronounces them identical. 



