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



in a double row near spiracular pore bands) terminating at the posterior pair 

 of 8-shaped pores or 1-8 8-shaped pores from it, nearly or quite as numerous 

 as 8-shaped pores near posterior end, and two to three times as numerous as 

 8-shaped pores between and outside of spiracular pore bands, twice as numerous 

 as 8-shaped pores at anterior end. 



Dorsal surface: Minute 8-shaped and disk pores usually numerous; tubular 

 ducts 24 fi long. 



Ventral surface: Antenna thimble-shaped or conical, with 1 seta as long as 

 diameter of antenna; beak with 2 pairs of setae; spiracular bar expanded at 

 inner end or throughout its length ; 20-30 quinquelocular pores extending from 

 spiracle to body margin in an irregularly double row; multilocular pores, total- 

 ing 20-30 (usually 26 or 27), with 10 loculi, in 4 complete rows, posterior row 

 with 9 or 10, each of next 2 with 4-7, and anterior row with 5; a loose group 

 of 5-10 dark-rimmed 8-shaped pores each side of mouth parts, a few scattered 

 between mouth parts and margin, and a few sometimes in a transverse row 

 posterior to beak; submarginal 8-shaped pores in an irregularly single row 

 (occasionally appearing double at some points) terminating near posterior row 

 of multilocular pores, nearly or quite as numerous as marginal 8-shaped pores: 

 submarginal setae in a complete row terminating near the posterior pair of 

 marginal 8-shaped pores ; 2 pairs of setae in the posterior row of multilocular 

 pores and 1 pair in each of the other rows. 



Apex of abdomen: Lobes sometimes indicated; setae, apical 44-52 jx long, 

 interapical 4.5-5.2 /a long, outer ventral 5.2 ft long ; anal opening ventral, circular, 

 its margin membranous or faintly sclerotized. 



Larva. — Elliptical. 



Margin : With 28 8-shaped pores, axes of all longitudinal ; 2 pairs of setae 

 anteriorly. 



Dorsal surface: 8-shaped pores in a submedian row of 7-9 and a lateral 

 row of 9, on each half of body, with a total of 32-36, anterior pores slightly 

 larger than posterior, the largest about two-thirds as large as a marginal pore ; 

 disk pores between submedian and lateral 8-shaped pores. 



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

 fairly stout, 2 slender ; bases of antennae one-half length of antenna apart ; 

 beak with 2 pairs of setae at tip ; anterior spiracle with 1 trilocular and 1 

 quinquelocular pore, posterior spiracle with 1 trilocular pore; leg setae, coxa 

 3, femur 1 on inner margin near base, tarsus 1 each on inner and outer margins ; 

 tibia one-fifth as long as tarsus ; 9 pairs of submarginal 8-shaped pores ; 7 

 pairs of submarginal minute setae posterior to spiracles, 1 pair of submarginal 

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



Apex of abdomen : Notch small ; setae, apical 42 //. long, interapical 7.2-9 fi 

 long, outer ventral 5.2 /x long; anal opening in margin; anal tube very short, 

 especially on ventral side, membranous ; anal ring a sclerotized band, apparently 

 normally without setae, but some specimens with 1 or 2 about 7.2 /x long. 



Data. — Described from unmounted and tjlie following mounted 

 material collected on Castanea from China (all unmounted and mounted 

 specimens, except holotype, are paratypes) : Two females and 11 larvae 

 on G. henryi, Tientai Shan, Chekiang, R. C. Ching, May 5-18, 1924, 

 U. S. N. H. ; 1 female on G. sequinii, near Siachu, Chekiang, R. C. Ching, 

 May 22-24, 1924, U. S. N. H.; the following material intercepted at 

 Washington, D. C, in January 1932, January 1934, January and 

 February 1935, and January and April 1936 by the Division of Foreign 

 Plant Quarantines, Bureau of Entomology and Plant Quarantine: 

 7 females on G. moUissima, Ysi Hong, holotype and paratypes; 54 

 females and 3 larvae on C. mollis sima, G. sequinii, or Castanea sp., 

 from near Nanking, Kiangsu; near Hangchow, Chekiang; Kiangsi. 



This species is closely related to pasaniae, but differs from it in 

 several particulars. Tests of castmneae are ovoid or circular and 

 distinctly smaller than the one available authentic test of pasaniae, 

 which is distinctly longer than wide. The most obvious microscopic 

 difference between the two is the arrangement of the multilocular pores, 

 which in castaneae are represented only by four complete rows and in 



