90 MISC. PUBLICATION 42 4, U. S. DEPT. OF AGRICULTURE 



Dorsal surface : 8-shaped pores in a longitudinal group on each half of body 

 in submedian area posterior to mouth parts, each group apparently composed of 

 an inner row of 7 or 8 and an outer row of 3 or 4, individual pores measuring 

 6-8 /* long and 3-5 wide, a pair 9 n long and 7 wide also in submarginal area 

 about length of apical seta from bases of setae ; minute 8-shaped pores fairly 

 numerous ; disk pores not observed ; tubular ducts 20 fi long ; dorsal tubes 

 present. 



Ventral surface: Antenna circular, very short, with 2 setae longer than diam- 

 eter of antenna ; beak without setae; spiracular bar fairly broad, atrium slightly 

 enlarged and containing 1-3 quinquelocular pores, 3 or 4 similar pores extending 

 to body margin in a single row; multilocular pores, totaling 28, with 6-10 (usu- 

 ally 10) loculi, in 3 complete and 3 interrupted rows, each of complete rows with 

 6-8, each of interrupted rows with 2 ; 2 or 3 dark-rimmed 8-shaped pores each 

 side of beak and a few on abdomen arranged in 3 or 4 transverse rows ; sub- 

 marginal 8-shaped pores in a single row apparently terminating near genital 

 opening, about as numerous as marginal 8-shaped pores ; 4 pairs of submarginal 

 setae on abdomen, the posterior pair the length of an apical seta from bases of 

 apical setae; 1 pair of setae in each of the posterior 2 rows of multilocular 

 pores. 



Apex of abdomen: Notch preseut, lobes indicated; setae, apical 40 /* long, 

 interapical 5.4 fi long, outer ventral 5.4 n long ; anal ring with 4 setae 5.4 fi long 

 and two 10 /* long, a tendency toward division of ring on dorsal and ventral 

 sides; ventral surface of apex slightly sclerotized in dentate rows in median 

 area. 



Larva. — Nearly elongate elliptical, posterior end slightly narrowed. 



Margin : With 28 8-shaped pores, the posterior and penultimate pairs slightly 

 larger than the first pair anterior to the penultimate, the latter the small- 

 est, and those anterior to it gradually increasing in size to the anterior pair, 

 which is distinctly the largest, axes of all longitudinal ; 4 pairs of setae at 

 anterior end. 



Dorsal surface : 8-shaped pores in a submedian row of 10 and a lateral row of 

 6, on each half of body, posterior submedian pores the smallest, increasing in size 

 to near anterior end of row, the anterior 3 pores at least slightly larger than 

 the marginal pores of same segments ; the posterior 2-5 pores of lateral row 

 about as large as posterior pore of submedian row, anterior lateral pore slightly 

 larger than next to anterior submedian pore ; disk pores sparse between sub- 

 median and lateral, and lateral and marginal, 8-shaped pores. 



Ventral surface : Antennal setae, I, 1 ; IV, 1 ; V, 1 ; VI, 2 long, 2 stout, 2 fairly 

 stout, 1 slender ; antennal bases one-half length of antenna apart ; beak setae, 2 

 pairs apical, 1 pair median ; anterior spiracle with 1 trilocular and 1 quinque- 

 locular pore or with 2 trilocular pores, posterior spiracle with 1 trilocular pore ; 

 leg setae, coxa apparently 3, femur 1 on inner margin at base and 1 each on inner 

 and outer margins near center, tarsus 2 on inner and 1 on outer margin ; tibia 

 one-half length of tarsus ; 9 pairs of submarginal 8-shaped pores ; 6 pairs of 

 submarginal minute setae on abdomen, submarginal larger setae not observed ; 



2 pairs of setae between antennae and mouth parts. 



Apex of abdomen : Notch small ; setae, apical 21 fi long, interapical 3.6-4.4 /* 

 long, outer ventral 2 p long ; anal ring with 6 setae 2-3 /j. long, apparently not 

 divided. 



Test of male. — Elongate elliptical, a notch in posterior margin ; 1 mm. long, 

 0.3 wide ; convex dorsally, most strongly so at anterior third, sloping to posterior 

 end, with median and lateral carinae rather faint on anterior third ; flat ventrally ; 

 very pale yellow, transparent, very thin, shiny ; marginal filaments pale yellow ; 

 dorsal filaments not observed. 



Adult male. — 0.8 mm. long. 



Head : Antenna broken, only 5 segments present, but presumably 10-segmented, 

 as in male nymph ; antennal setae, I-V, 9-12 ; basal bars slightly diagonal ; 22 setae 

 between ventral eyespots and antennae, 3 setae along linear bar between antennae, 

 and 1 on dorsal surface. 



Thorax : Bar between wing bases rectangular, nearly four times as long as 

 wide, with a fold in center ; tibia three-fourths length of tarsus. 



Abdomen: Five segments each with a pair of setae dorsally on lateral margin, 



3 segments each with a pair of setae in ventral lateral area ; lobe areas each 

 with 1 long and 2 short setae ; penis sheath rather short and stout, strongly 

 curved near posterior end, with 1 pair of setae on dorsal surface near base and 



4 setae on each side of ventral opening from near base toward tip, none at tip. 



