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



broad and expanded at inner end ; 35-55 quinquelocular pores extending from 

 spiracle to body margin in a row irregularly double or triple near spiracle but 

 5 or 6 pores wide near margin ; multilocular pores, totaling 271, with 6-14 (usually 

 10-12) loculi, in 5 complete and 4 interrupted rows, the posterior row with 26 

 pores, penultimate row with 40, next with 66, next with 56, next with 43, next 

 with 17, next with 11, next with 7, and anterior row with 5 ; 4 or 5 dark-rimmed 

 8-shaped pores each side of beak, some scattered on anterior end, and others 

 arranged in at least 4 transverse rows on abdomen ; submarginal 8-shaped pores 

 in a double row terminating near the posterior row of multilocular pores, 1 or 2 

 opposite each marginal 8-shaped pore ; submarginal setae in a complete row 

 terminating anterior to posterior pair of marginal 8-shaped pores ; 2 pairs of 

 setae in posterior row of multilocular pores and 1 pair in each of the next 2 rows. 



Apex of abdomen : Notch present ; lobes indicated ; setae, apical 92 /x long, 

 interapical 20 ti long, dorsal 16 n long, intermediate ventral 8 ix long, outer 

 ventral 12 jx long ; anal ring with 6 setae 36-40 ix long and with an inner row of 

 apparently 6 pores and an outer one of an indeterminable number, but probably 

 around 14, divided on dorsal side and tending toward division on ventral side ; 

 ventral surface of apex sclerotized and rugose. 



Larva. — Nearly elliptical, posterior end slightly narrowed. 



Margin : With 28 8-shaped pores, the posterior 6 pairs slightly smaller than 

 next 7, the anterior pair a little larger than any others, axes of the posterior 6 

 pairs transverse, of the others longitudinal ; a pair of minute setae close to each 

 of the posterior 3 pairs ; 4 pairs of setae at anterior end. 



Dorsal surface: 8-shaped pores in a submedian row of 9 or 10, a lateral row 

 of 3-5, and a submarginal row of 5-7, on each half of body, the total number 

 ranging from 38-42, lateral and submarginal rows rather indistinct and appear- 

 ing somewhat as an irregular lateral row, anterior pores slightly larger than 

 posterior pores, all practically the same size as marginal pores of same seg- 

 ments ; disk pores between submarginal and marginal 8-shaped pores. 



Ventral surface: Antennal setae, I, 2; IV, 1; V, 0: VI, 2 long, 2 stout, 3 

 fairly stout, 2 slender ; antennal bases one-third length of antenna apart ; beak 

 setae. 2 pairs apical, 1 pair basal ; spiracle with 1 trilocular and 1 quinque- 

 locular pore ; leg setae, coxa 4, femur 1 on inner margin near base and 

 1 each on inner and outer margins near center, tarsus 2 on inner and 1 on 

 outer margin ; tibia three-fifths as long as tarsus ; 8 pairs of submarginal 8-shaped 

 pores of which 1 pair is between the antennae ; 10 pairs of submarginal minute 

 setae, on abdomen and thorax, 3 pairs of submarginal larger setae at anterior 

 end; 2 pairs of setae between antennae and mouth parts. 



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

 81 ij. long, interapical 9 /x long, dorsal 2-3 /x long, intermediate and outer ventral 

 5.4 /x long ; anal ring with 6 setae 24 /x long and with an inner row of 6 and an 

 outer one of apparently 12 pores, divided on dorsal side. 



Test of male,— Elongate elliptical, a minute potch at posterior end ; 1.5-1.75 

 mm. long, 0.7 wide : fairly convex dorsally, with a faint longitudinal median 

 carina ; presumably flat ventrally ; pale yellow, transparent, thin, shiny, punctate : 

 marginal and dorsal filaments whitish, fragmentary ; dorsal filaments presumably 

 scattered over surface. 



Third-stage male. — Elongate ovoid, posterior end narrowed; margin with quin- 

 quelocular pores much less numerous than in female ; dorsal surface with 8-shaped 

 pores arranged in transverse groups along median line and in lateral and sub- 

 marginal areas, less numerous than in female, varying in size like those of 

 female ; ventral surface with 6-9 quinquelocular pores in each spiracular row ; 

 submarginal 8-shaped pores in an irregularly single row, less numerous than in 

 female; legs represented by 3 pairs of faintly sclerotized, slightly elevated, cir- 

 cular areas, each with a minute spurlike claw or a bluntly sclerotized spot ; apex 

 of abdomen as in female, but all setae, except dorsal and ring setae, around 

 one-third shorter, the ring setae as long as, the dorsal setae slightly longer than, 

 corresponding setae in female. 



Data. — Redescribed from specimens (two females, seven larvae, 

 and six third-stage males, mounted) on Guazuma sp., Platanas, Jalisco, 

 Mexico, received July 1903, type. 



Most closelv related to cristatum. 



