172 MISC. PUBLICATION 4 2 4, U. S. DEPT. OF AGRICULTURE 



and laterad of mouth parts, and others arranged in 7 or 8 transverse rows 

 posterior to mouth parts ; submarginal 8-shaped pores much larger in com- 

 parison to the marginal than in other species, 7 or 8 /x long and 5 wide, arranged 

 in a double row terminating near the first row of multilocular pores anterior 

 to the penultimate row, nearly as numerous as corresponding marginal 8-shaped 

 pores ; submarginal setae in a complete row terminating slightly nearer to bases 

 of apical setae than to the posterior pair of marginal 8-shaped pores ; 2 setae 

 each in the posterior and penultimate rows of multilocular pores and sometimes 

 1 in the first row anterior to penultimate. 



Apex of abdomen :' Notch present ; setae, apical 45 fx long, interapical 9-10.8 u 

 long, dorsal (absent from 1 side of 1 specimen examined) 7.2-10.8 /x long, inner 

 ventral 5.4 /x long, intermediate ventral 7.2-9 /x long, outer ventral 10.8-14.4 ix 

 long, either inner or intermediate ventral seta usually lacking on 1 side of 

 body ; anal ring with 6 setae about 54 /x long, with an inner row of 6 and an 

 outer one of 26 pores, divided on dorsal and ventral sides ; ventral surface of 

 apex rugose or reticulate. 



Second stage. — Resembling adult female but smaller, longer than wide; margin 

 with 8-shaped pores in a single row though somewhat irregular and tending 

 to be double at some points ; dorsal surface with 8-shaped pores less numerous 

 than in adult ; ventral surface with bar of spiracle narrower than in adult and 

 with 3 or 4 quinquelocular pores between spiracular opening and body margin, 

 submarginal 8-shaped pores much smaller in comparison with marginal pores 

 than in adult and arranged in a single row ; apex of abdomen as in adult but 

 all setae approximately one-fifth shorter. 



Larva. — Elongate ovoid. 



Margin : With 28 8-shaped pores, axis of the posterior pair transverse, axes of 

 the next 3 or 4 pairs diagonal or longitudinal, and of the others longitudinal ; 

 apparently 2 pairs of setae at anterior end. 



Dorsal surface : 8-shaped pores in a submedian row of apparently 5-10 and a 

 lateral row of 10-12, on each half of body, or a total of 34-43, 1 or 2 pores of 

 lateral row inside a straight line through the remaining pores and suggestive of 

 an intermediate row, anterior pores of each row slightly larger than posterior 

 ones, lateral pores slightly larger than submedian, anterior pores of lateral row 

 nearly as large as marginal pores, the posterior ones apparently larger ; disk 

 pores between submedian and lateral, and between lateral and marginal, 

 8-shaped pores. 



Ventral surface : Antennal setae, I, apparently ] ; IV, 1 ; V, 1 ; VI, 4 long, 2 

 stout, 3 or 4 fairly stout ; distance between antennal bases slightly more than 

 one-third length of antenna ; beak setae, 2 pairs apical, 1 pair basal ; spiracle 

 with 1 trilocnlar and 1 quinquelocular pore ; leg setae, coxa 3, femur 1 on inner 

 margin near base and 1 each on inner and outer margins near center, tarsus 1 

 each on inner and outer margins ; tibia one-third as long as tarsus ; apparently 

 8 pairs of submarginal 8-shaped pores of which 1 pair is between the antennae ; 

 8 pairs of submarginal minute setae on abdomen in a single row except on penul- 

 timate segment, where the row is double, apparently 1 pair of submarginal larger 

 setae at anterior end; 3 or 4 setae between antennae and mouth parts. 



Apex of abdomen : Notch present ; lobes sometimes indicated ; setae, apical 

 95-100 fx long, interapical 5.4-10.8 /x long, dorsal (lacking on 1 side in 1 specimen 

 examined) 3.6-5.4 /x long, inner ventral (lacking on 1 side of 1 specimen exam- 

 ined) 3.6-5.4 /x long, intermediate ventral 5.4-9 /x long, outer ventral 7.2 fx long; 

 anal ring with 6 setae about 25.5 ix long and with an inner row of 6 and an outer 

 one of 14 pores, divided on dorsal and ventral sides. 



Test of male. — Elliptical, a notch in posterior margin; 1.5 mm. long, 0.7 wide; 

 dorsally slightly convex at anterior end, sloping to posterior end, with longitu- 

 dinal median and lateral carinae, and with faint transverse striations ; nearly 

 flat ventrally; greenish yellow, transparent, thin; marginal filaments rubbed off; 

 dorsal filaments whitish, very short. 



Adult male. — 1.5 mm. long. 



Head: Antenna 10-segmented ; formula (longest to shortest), (III), (IV), 

 (V), (VI), (VII), (VIII, TX), (I, II, X); antennal setae, I, 1; II, 9; 

 III, 13; IV apparently with 20; V, VI, VII, 19; VIII, 18; IX, 16; X, 5 very long, 

 1 stout, and 7 fairly long ; basal bars strongly diagonal ; 1 seta between ventral 

 eyespots and antennae ; 3 minute tubercles dorsally near base of each antenna. 



Thorax : Bar between wing bases curved on anterior margin, with a longitudi- 

 nal fold in center, two and a half times as long as wide ; tibia slightly longer 

 than tarsus. 



