154 THE CANADIAN ENTOMOLOGIST. 



conclusive for the species they noticed, but I cannot think they will hold 

 for the group, but rather that they are dejjartures from a normal habit, the 

 Thrips in those cases finding the soft-bodied, sluggish plant lice preferable 

 to the plant tissues lying beneath them, — the habits of the plant lice mak- 

 ing it less necessary for the predaceous insect to be specially adapted to 

 seizing and retaining them. Indeed, may it not be that they seek rather 

 the juicy exudation from the bodies of these insects than to destroy them ? 



Phlocothrips nigra, n. sp. 



Length i. 75-1. 80 m.m. Width .37 m.m. 



Black, distal portion of anterior tibiae, proximal joint of all tarsi and 

 joints 3 with base of 4, sometimes 3-5, of antennae, yellowish. Head 

 from above quadrangular, longer than broad, front convex with lateral 

 angles obtusely rounded. Antennre sub-approximate, third joint yellowish 

 and the two following ones more or less pale, especially at base ; joints 

 nearly equal, 8th short and small, sparsely set with, hairs. Prothorax 

 short, broad, lateral borders converging toward the head ; meso and meta- 

 thorax together as long as broad, converging slightly toward the abdomen ; 

 abdomen tapering, caudal segments sparsely fringed with hairs ; tube 

 fringed at end. Anterior legs larger than the others, with tibiae and tarsi 

 yellowish, set with a few very minute hairs ; posterior tibiae with spines at 

 the distal extremity. 



Wings without veins, perfectly membranous, no minute hairs on the 

 surfaces ; anterior pair with a row of three spines near the costal border 

 at the base ; fringe at base wanting ; very long on both borders and at 

 apical portion of posterior border composed of two rows, the additional 

 one of finer ciliae. 



Differs but slightly from F. iiia/i Fitch, that species being purple-black, 

 joint three of antennae white and the tibiae and tarsi not yellow. Possibly 

 this may prove only a variable form. Collected from heads of red clover. 

 Ames, Iowa. 



Chirothrips antennatus, n. sp. 

 ^Length i.io m.m. Width .25 m.m. 



Black, except joint 3 of antennae, which is paler. 



Head small, narrowed in front, and here entirely occupied by the 

 bases of the large peculiar 8-jointed antennae, the basal joints of which 

 are very l)road, short and inserted in large concavities of the front ; joint 

 2 is large, irregularly trapezoidal, with the acute angle outward ; joints 3 



