164 MISC. PUBLICATION 42 4, IT. S. DEPT. OF AGRICULTURE 



locular pores in a group outside spiraeular opening and 4 or 5 similar" pores ex- 

 tending to body margin in a single row, 6-10 in group and row combined ; slightly 

 enlarged quinquelocular pores replacing multilocular pores on abdomen, arranged 

 in 4 complete and 2 or 3 interrupted rows, each of complete rows with 4-7 pores 

 and each of interrupted rows with 1-4, the total being 25-32; 1-4 dark-rimmed 

 8-shaped pores each side of beak, a very few scattered near spiracles, a few 

 arranged in a rather indefinite longitudinal row in lateral area, and a few tend- 

 ing toward arrangement in 3 or 4 transverse rows in median area posterior to 

 mouth parts ; 2 disk pores between apical setae and quinquelocular pores and 



1 at each end of posterior and penultimate rows of quinquelocular pores ; sub- 

 marginal 8-shaped pores in a single row terminating near the posterior pair of 

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

 submarginal setae on abdomen, the posterior pair at end of the posterior row of 

 quinquelocular pores and 1 pair of setae in each of the posterior 3 rows of quinque- 

 locular pores. 



Apex of abdomen : Setae, apical 3,4 (x long ; anal opening apical ; anal tube 

 heavily sclerotized on outer half, largest in center, slightly larger at ring than 

 at opening ; anal ring with 6 setae, each 5.4 n long ; ventral surface of apex 

 sometimes finely wrinkled. 



Larva.- — Somewhat ovoid, posterior end almost pointed. 



Margin: With 28 8-shaped pores, axes of all longitudinal; 3 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 pore of submedian row smallest, the next 

 4 gradually increasing in size but all 5 slightly smaller than the rest, the posterior 



2 submedian pores practically same size as marginal pores, the others slightly 

 larger, the posterior 5 pores of lateral row around two-thirds as large as the 

 anterior pore, which is the same size as the anterior pore of submedian row ; disk 

 pores between lateral and marginal, and between lateral and submedian, 8-shaped 

 pores. 



Ventral surface : Antennal setae, I, 1 ; IV, 1 ; V, 1 ; VI, 2 long, 2 stout, 3 fairly 

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

 2 pairs apical, 1 pair median ; each spiracle with 2 trilocular pores ; leg setae, 

 coxa 4, femur 1 on inner margin near base and 1 on inner margin near center, 

 tarsus 1 each on inner and outer margins ; tibia one-half as long as tarsus : 

 9 pairs of submarginal 8-shaped nores : apparently 6 pairs of submarginal minute 

 setae on abdomen, 1 pair of submarginal larger setae at anterior end ; 1 pair 

 of setae between antennae and mouth parts. 



Apex of abdomen : Notch very small : setae, apical 28 n long, interapical 3.6 fi 

 long, outer ventral 2.5 /j. long ; anal opening apical, anal tube uniformly sclerotized 

 throughout, rather short, largest at center; anal ring with 6 setae 2 ^ long. 



Test of male.— Nearly elliptical, posterior end slightly pointed, a notch at 

 tip; 0.85 mm. long, 0.5 wide; slightly convex dorsally, sloping to posterior end, 

 with a broad longitudinal median carina and faint transverse striations ; flat 

 ventrally ; yellow, transparent, thin, shiny ; marginal filaments yellowish or pale 

 orange, apparently slightly shorter at posterior end than elsewhere ; dorsal fi'a- 

 ments yellowish or orange, brighter than marginal and slightly longer, apparently 

 in 10 transverse groups along longitudinal median line. 



Adult male, — Only available specimen enclosed in nymphal stage and most 

 characters indeterminable ; 1 mm. long ; antenna apparently 10-segmented ; setae 

 present on abdomen and penis sheath but number and position indeterminable. 



Male nymph. — Characters indeterminable beyond those listed for adult male, 

 except for the presence of 1 short seta and 2 minute setae in lobe areas of 

 abdomen. 



Third-stage male. — Nearly elliptical, posterior end narrowed ; margin with 

 8-shaped pores terminating a pore's length from bases of apical setae, posterior 

 pores slightly smaller than the rest, quinquelocular pores present from a point 

 near antennae to the posterior pair of 8-shaped pores, usually 1 opposite each 

 8-shaped pore ; dorsal surface with 8-shaped pores in 10 transverse groups along 

 median line, posterior group with 2 pores, penultimate with 8, each of next 3 

 with 9, next with 10, next with 11, next with 13, next with 12, and anterior 

 with 15, the pores variable in size, but all larger than marginal ; ventral surface 

 with 2 pairs of setae on beak, 1-3 pores in each spiraeular row, legs repre- 

 sented by 3 pairs of circular, slightly sclerotized, raised areas each, with a 

 small, straight, sharp claw, 1 pair of setae observed in median abdominal area ; 

 apex of abdomen with apical setae 4.4 ^ long, outer ventral setae 2 /x long. 

 anal opening much larger than in adult female, anal tube, sclerotized in a 



