MICROLEPIDOPTERA OF PHILIPPINE ISLANDS 113 



bristles along the caudal edges; ninth segment strongly elongate, a 

 membranous spheroidal aciculate fold ventrally. Apophyses long. 

 Ductus bursae rather wide and long. Bursa copulatrix elongate, 

 punctulate, with a curved patch of verrucose structures, without signa. 

 Material examined: Luzon, Mt. Makiling (Baker), 1 9, holotype, 

 genit. slide 5024 (USNM). 



Xyloryctidae 



Key to the Philippine Genera of Xyloryctidae 



1. Hind wing 1>^ times as broad as forewing Thymiatris 



Hindwing not so much broader than forewing 2 



2. Gnathos absent (except in brachyclista) ; uncus, a slender, porrect beak; 



tegumen seemingly truncate Odites 



Gnathos present 3 



3. Harpe, a characteristic, crescentic raised crest, beset with spines; uncus 



truncate, broad, and bidentate Metathrinca 



Harpe, a toothed blade; uncus bifid Amorbaea 



Thymiatris Meyrick, 1907 



Thymiatris Meyrick, 1907, Journ. Bombay Nat. Hist. Soc, vol. 17, p. 738. — 

 Fletcher, 1929, Mem. Dept. Agric. India, Ent. ser., vol. 11, p. 222. — Clarke, 

 1955, Catalogue . . . Microlepidoptera . . . Meyrick, vol. 2, p. 502, 

 pi. 250, figs. 1-ld (wings, head, neuration, genit.). 



Type species: Thymiatris melitacma Meyrick, 1907 (Assam). 



Although gigantic forms of the family Xyloryctidae are confined 

 to the Australian and Papuan regions, the large representatives of the 

 present genus form an exception, occurring throughout the Malay 

 Archipelago as far westward as Assam. According to Meyrick, these 

 regions were inhabited by a single wide-spread species, Thymiatris 

 melitacma Meyrick, originally described from the Khasi Hills, Assam. 

 It appears to me now, however, that the material from the Philippine 

 Islands belongs to a closely allied but distinct species differing not 

 only in minor characters of the male genitalia, but also, and surpris- 

 ingly* by certain superficial features. The description of the genus, 

 therefore, needs to be extended as follows. 



Labial palpus with median segment rather smooth, terminal seg- 

 ment slightly over 1/2. Forewing sometimes with veins 4 and 5 

 separate (in the type species these veins are stalked, a fact not men- 

 tioned in the original description), vein 9 separate. 



Thymiatris aristUy new species 



Figures 156, 583 



Male, 40 mm. Head Hght ochreous. Antenna glossy tawny 

 ochreous, ciliations 1, scape light ochreous. Palpus light ochreous, 



