NO. 1310. NORTH AMERICAN THYSANOPTERA—JIlMfS. 149 



Thrills trliid Lintnek, 11th Kept. N. Y. St. Entom., 1896, pp. 247-250. 

 Thrips tiilin Rolfs, 10th Aim. Meet. Fla. St. Ilort. Soc, 1897, p. 97. 

 TIiHpx tntiri Qv\i^r.\y!CK, Bull. 42, Fla. Agr. Exp. Sta., 1897, jip. 5.52-5G4. 

 Tliri])!f irifici Powkrs, Fla. Farmer and Fruit Grower (editorial), March 27, 1897. 

 llirips tritici Quaintance, Bull. 46, Fla. Agr. Exp. Sta., 1898, pp. 77-103, figs. 1-9. 

 Thrljjs trltin Howard, Bull. 18, N. S., U. S. Dept. Agri., 1898, p. 101. 

 TlmpstrUin Rolfs, 11th Ann. Meet. Fla. St. Hort. Soc, 1898, pp. 84-38. 



Ft'Jiude.- — Lent^th about 1.22 mm.; Avidth about <>.2t> mm. General 

 color brownish 3'ellow, thorax tinged with oranoe. 



Head three-fourths as long* as broad and four-tifths as long- as pro- 

 thorax, but slightly withdrawn therein; cheeks but slightly arched 

 behind the eyes and converging slightly posteriorly; anterior margin 

 very nearl}' straight; back of head transversely striated. Eyes large, 

 dark, and slighth^ pilose, occupying together about three-fifths the 

 width of the head; ocelli present, sub-approximate, pale yellow, mar- 

 gined inwardly with bright reddish orange crescents; spines between 

 ocelli on each side long and conspicuous; post-ocular spines shorter. 

 Maxillary palj)i three segmented. Antennie nearl}^ two and one-half 

 times as long as the head; relative lengths of segments: 



Color: One pale yellow; two light brown, base sometimes yellowish; 

 three light yellow in basal half, remainder shaded light brown; four 

 and five brown, yellowish at bases; six, seven, and eight brown. 

 Spines upon antennal segments, especially two to five, quite stout and 

 conspicuous. 



Prothorax rather rounded, three-fourths as long as broad; one pair 

 of stout spines at each angle, also one short anteriorly directed spine 

 standing close to lower one of each fore pair; between each posterior 

 pair and median line stands a row of five spines, number four alone 

 being large; color of prothorax pale orange-yellow. Mesothorax 

 rounded at anterior angles; mesonotal plate with one stout spine at 

 each lateral angle and two pairs of small spines on posterior margin. 

 Metathorax tapering but slightW posteriorly; metanotal plate bearing 

 four spines c^ose together at anterior edge, the middle pair being 

 much more stout and conspicuous. ^\'ings nearly reaching the end of 

 abdomen; breadth at middle about one-twelfth their length; shaded 

 but slightly; each fore wing has two longitudinal veins extending from 

 base to tip of wing; spines on veins at regular intervals; costa twenty- 

 six to twenty-eight; fore vein twenty to twenty-two; hind vein fifteen 

 to eighteen; scale five, interior of scale one; a light, sparse fringe on 

 costa of each wing; posterior fringes heav}" and wavy. Legs clear 

 pale yellow, sometimes slightl}^ shaded with light brown above, quite 

 thickh' set with short brown spines; a pair of stout spines iit extremity 

 of each tibia; rows of spines on inner side of hind til)i;e rather weak. 



