NO. 1310. NOR Til A MERICA N THYSANOPTERA— HINDS. 147 



basal parts, shading to dark brown toward the tips; seven and eight 

 dark brown; spines distinct but not prominent, becoming more slen- 

 der toward the tip. 



Prothorax about one and one-half times as long as head, and one 

 and one fourth times as broad at posterior edge; sides nearly straight, 

 diverging l)ackward; dorsal surface })earing a number of small, dark 

 spines, mostly near lateral and posterior borders; one stout, promi- 

 nent spine at each hind angle. Mesothorax over one and one-half 

 times as wide as head; sides rounded and converging anteriorly; fore 

 angles prominent. Metathorax but little narrower than mesothorax; 

 its sides nearly parallel, curving inward abruptly at hind angles. 

 Wings reaching almost to tip of a))domen; two longitudinal veins quite 

 prominent; both veins and costa thickly and regularly set with prom- 

 inent dark brown spines; costal twenty-four to twenty-eight, fore 

 vein eighteen to nineteen, hind vein ten to eleven, scale five, internal 

 one. Fore wing about one-fifteenth as broad in middle as long, shaded 

 faintly yellowish: costal fringe well developed. Legs dusky yellow, 

 quite slender; fore femora slightl}- thickened; femora and tibia? bear- 

 ing numerous short spines; inner side of hind tibia? with but few 

 stouter spines except one pair at tip; each hind tarsal segment with 

 one stout, dark spine on the side; a dark brown spot on under side of 

 each tarsus at tip. 



Al)domen elongate-ovate; few dark spines along the sides; segments 

 two to eight bear across the middle of each dorsal plate four weak 

 spines, the middle two are close together upon anterior segments, but 

 diverge posteriorly; posterior edge of nine bears a circlet of six stout 

 spines, the median pair being only slightly more than half as long 

 as the others. All spines on body, and spines and fringes on wings 

 conspicuously dark brown; abdomen dusky yellow, dark brown at 

 extreme tip. 



Redescribed from one female, "Type" of Miss Beach. 



Male unknown. 



Food plant. — Aster. 

 ' Habitat. — Ames, Iowa, 



This species bears a close general resemblance to Euthrips tritici, 

 with which it was taken. 



Genus EUTHRIPS Targioni-Tozzetti. 

 PHY80PUS." 

 Ocelli usually present but sometimes more or less rudimentary. 

 Antennae eight segmented. Maxillary palpi three segmented. Pro- 



« The name Phympus was used by Amj'ot and Serville for this genus in 1843, but it 

 can not hold, as this name was previously used by Leach for a genus of the Neurop- 

 tera in 1817. 



I have been unaljle to see Targioni-Tozzetti' s characterization of his genus Enthrips, 

 but as nearly as I can tell it may include the species which have been jilaced in the 

 genus Physopua, and I therefore adopt it for this genus. 



