MICROLEPIDOPTERA OF PHILIPPENTE ISLANDS 65 



The species (under the name B. truculenta) is recorded to be of 

 peculiar economic importance as it is a useful pest of the weed "nut 

 grass" (Cyperns rotundus), in the stems of which the larvae bore. 

 In the years 1922-1926 the species was introduced from the Philippine 

 Islands to Hawaii, where it became established. Later followed 

 introductions to the Fiji Is. and Australia. The measure, however, 

 was not a great success, apparently due to parasites which affect 

 eggs and larvae of B. venosana. 



Bactra {Chiloides) orbiculi minax Diakonoff, 1964 



Figures 80, 538 



Bactra (Chiloides) orbiculi minax Diakonoflf, 1964, Zool. Verb., no. 70, p. 51, 

 figs. 45-47 (cf, Luzon). 



Distribution: Philippine Is., Luzon. 



Material examined: Luzon, Benguet, Klondyke, 800 ft., 9.V.1912 

 (A.E. Wileman), 1 cT, holotype, genit. slide 5529 (BM). The nomi- 

 nate form occurs in East and South Borneo. The present subspecies 

 differs by the stronger armature of the valva. 



Subgenus Nannohactra Diakonoff, 1956 



Bactra (Nannohactra) phaulopa Meyrick, 1911 



Figure 537 



Bactra phaulopa Meyrick, 1911, Proc. Linn. Soc. New South Wales, vol. 36, p. 

 253 (9, Kei Is.).— Diakonoff, 1950, Bull. British Mus. Nat. Hist., Ent. ser., 

 vol. 1, p. 288, pi. 8, fig. 42 (lectotype selected, genitalia figured). 



Bactra (Nannohactra) phaulopa. — Diakonoff, 1956, Zool. Verh., no. 29, p. 52, 

 figs. 50-51; 1964, op. cit., no. 70, p. 77. 



Distribution: Java, Sumatra, Celebes, Kei Is. North Moluccan 

 Is., Philippine Is. 



Material examined: Luzon, Manila, XII. 1945 (CNHM Phihppine 

 Zool. Exped. 1946^7, H. Hoogstraal) , 6cf, genit. slides 5761, 5762 

 (CNHM). 



BubonoxenUf new genus 



Head with roughly appressed scales forming a small tuft on forehead, 

 face smooth. Antenna in male slightly thickened and serrulate, 

 pubescent. Ocellus posterior. Proboscis very short. Palpus sub- 

 ascending, basal segment roughish, median segment moderately long, 

 slender anteriorly, abruptly and strongly dUated and triangular 

 posteriorly, rough along apex, terminal segment slender, subobtuse, 

 moderate. Thorax without a crest. Ilindtibia normal. 



Forewing elongate, rather narrow, apex subobtuse, termen gently 

 rounded, oblique. Vein 2 from 3/5, 3 from angle, 3 to 5 moderately 



