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



tending toward division on ventral ; ventral surface of apex with a heavily 

 sclerotized, roughly triangular area extending anteriorly from bases of inner 

 lobes, surrounding area sclerotized in dentate rows. 



Second stage— Resembling adult female, but smaller ; margin with quinque- 

 locular pores usually present opposite spiracles and at a few other points ; dorsal 

 surface with 3 or 4 8-shaped pores in submedian area, these distinctly larger 

 than marginal 8-shaped pores ; ventral surface with 2 or 3 quinquel ocular pores 

 in each spiracular row ; apex of abdomen as in adult, but all setae about one- 

 fourth shorter. 



Larva. — Broadly elliptical. 



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

 the anterior 3 pairs slightly larger than the others, axes of the posterior 6 pairs 

 transverse, the others longitudinal ; 3 pairs of setae anteriorly. 



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

 8, and a submarginal row of 2 or 3, on each half of body: in the submedian row 

 the posterior 3 pores slightly smaller, and the anterior 2 or 3 pores slightly larger 

 than the others, all around one-fourth smaller than marginal pores of same 

 segment ; anterior pore of lateral row much larger, and the one next to it 

 slightly larger than posterior pores, which are a little smaller than the submedian 

 pores ; 1 or 2 submarginal pores the same size as those situated posteriorly in the 

 lateral row, but the anterior submarginal pores as large as anterior lateral or 

 anterior submedian pore ; disk pores near marginal 8-shaped pores and between 

 submedian and lateral 8-shaped pores. 



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

 stout, 2 slender ; bases of antennae 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 3, 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 pores ; 9 pairs of submarginal 

 minute setae, on abdomen and thorax. 3 pairs of submarginal larger setae 

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



Apex of abdomen : Notch present ; lobes not, or barely, indicated ; setae, apical 

 42 ix long, interapical 5.4-6 fx long, dorsal 3.6 m long, intermediate ventral 3.6-4 

 ix long, outer ventral 4.2 ix long ; anal ring with 6 setae, each about 21.6 \x long, 

 also with an inner row of 6 and an outer one of apparently 14 or 15 pores, 

 divided on dorsal side and tending toward division on ventral ; ventral surface 

 of apex sclerotized in dentate rows near median notch, but sometimes with a 

 more heavily sclerotized, roughly triangular area outlined. 



Data, — Redescribed from unmounted material, 2 mounted females, 

 and 25 mounted larvae on Maranta vittata in greenhouses [Paris, 

 France], type material of aureum, determined by Signoret. loaned 

 by M. Beier ; unmounted material and 2 mounted females on Brough- 

 tonia sanguima, Kingston, Jamaica, Cockerell Collection, types of 

 oncidii; unmounted material, 5 mounted females, and 6 mounted lar- 

 vae on Rheedia lateriflora, taken in greenhouses in Paris, France, P. 

 Marehal, 1904, types of greeni; and a mass of unmounted material, 132 

 mounted females. 3 mounted second-stage specimens, and 25 mounted 

 larvae from the following sources : On Angraecum from Jamaica and 

 British Guiana; on Anthuriitm from New York (in greenhouses), 

 Puerto Rico, Italy (in greenhouses) ; on Brassia from Costa Rica, 

 Dominican Republic; on Cattleya from Costa Rica, Colombia, Brazil; 

 on Epidendmm from Dominican Republic, Cuba, Guatemala; on 

 Gongora from Trinidad ; on Hifpeastrum from Trinidad ; on Laelia 

 from Mexico; on Oncidmm from England (in greenhouses), Domini- 

 can Republic, Costa Rica, Canal Zone, Trinidad; on Zamia from Trin- 

 idad : on unknown genera of Orchidaceae from many of the preceding 

 localities and Cuba, Venezuela, Portugal, Ceylon; and on Chamaedorea 

 (Palmae) from Guatemala. 



This species differs from ingae, which it resembles, in having nor- 

 mally a dorsal submarginal row of 24 to 26 8-shaped pores, as well as 

 in other characters. 



