INSECT PESTS 233 



approximately straight and parallel. Eyes dark red in color, not protruding, occupy- 

 ing together fully one-half the width of the front of the head and being one half as 

 long as the head; margins around eyes pale yellow in color; surface of eyes finely 

 faceted and slightly pilose; three ocelli present, well separated, posterior ones con- 

 tiguous with yellow borders to eyes, pale yellow in color and margined inwardly 

 with pale-orange crescents; one moderately stout dark spine in front of each 

 posterior ocellus ; postocular spines weak and inconspicuous. Mouth cone reaching 

 nearly to posterior edge of the prosternum, tapering abruptly; maxillary palpi 

 slender, three-segmented. Antennae inserted slightly below front margin, approxi- 

 mate at base, about two and one-half times as long as the head and approximately 

 equal to breadth of mesothorax. 



Segment 1 is rounded, three-fourths as long as broad ; 2 is broad as/1 ; following 

 segments about three-fourths as thick ; segments 3 to 6 are constricted at bases, be- 

 coming more stout successively. Color of segments 1 and 2 uniform light brown ; 3 

 to S pale yellow at bases, shading to brown at outer ends, each succeeding segment 

 from 3 to 6 becoming darker in color ; 6 to 8 are dark brown. Spines upon segments 

 2 to S are of medium size, but not very conspicuous. Color of head varying from 

 gray-brown to yellow-brown. 



Prothorax about five-ninths as long as broad and slightly longer than the head ; 

 sides rounded, slightly wider at hind than at fore angles ; one stout spine at each 

 anterior, and two stouter spines of equal size at each posterior angle; anterior 

 marginal pair of spines about one-half as long as those at front angles; usual row 

 of five spines on each side of hind margin, of which number 4 is equal in strength 

 to those on the front margin. Mesothorax nearly one and one-third times as wide as 

 the prothorax, broadest posteriorly, sides curving outward; mesonotum without 

 conspicuous spines, posterior margin forming an obtuse angle in middle. Metathorax 

 slightly narrower than mesothorax, sides nearly parallel, broader than prothorax 

 at posterior edge; metanotum bears two pairs of spines at front edge, the inner 

 pair as strong as those at front angles of prothorax. Wings present (probably 

 reduced at some season of year), average length about 0.68 mm., not reaching to the 

 tip of the abdomen, breadth equal to about one-thirteenth of their length ; fore 

 wing has two longitudinal veins, each bearing stout spines set at regular intervals; 

 fore wings shaded ash gray, hind wings gray only along basal three-fourths of 

 midvein; spines on wing veins dark brown and conspicuous; costa bears 19 to 24 

 spines ; fore vein, 13 to 18 ; hind vein, 10 to 12 ; scale, 5 ; interior of scale, 1 ; fringe of 

 hairs on costa of fore wing quite heavy, in length exceeding the breadth of the 

 wing. Legs of medium length, lighter than body in color, pale yellow, shaded more 

 or less with brown on upper side of middle of femora and tibiae; a pair of stout 

 brown spines at inside of tip of each tibia, small brown spines scattered along femora 

 and tibiae ; spines standing in two rows on inner side of hind tibiae are weak and 

 only about four in each row. 



Abdomen nearly cylindrical to eighth segment, then tapering abruptly to an 

 acute tip ; color uniformly dark brown ; a still darker-colored narrow chitinous 

 thickening extends across dorsal side of segments 2 to 8 near anterior edge. Three 

 or four quite stout and rather conspicuous dark-brown spines stand at each side of 

 dorsal plates on 2 to 8; six rather prominent spines stand in a row on posterior 

 edge of ventral plates 2 to 7 ; terminal spines stout and prominent ; tenth segment 

 split open along dorsal median line. 



