240 INSECT ENEMIES OF THE CODLING MOTH. 



This parasite is evidently indigenous to South Africa, and 

 probably existed by breeding in the eggs of the native moth, 

 Bnannonia batracJwpa, before the introduction of codling moth 

 into the country. The writer has found that the parasite will 

 breed also in a pear slug egg. 



Description of the Adult. — The following description of the 

 insect was made from alcoholic specimens. The dorsal aspect 

 of a female is illustrated in Plate XIX (a). 



Female: Length .7 to .9 mm., varying in size according to 

 the number which emerges from a codling ^tgg. General colour 

 yellow, with dusky brown markings. Head yellow, eyes and 

 ocelli carmine, front below eyes dusky yellow. Thorax: pro~ 

 notum and prescutum dusky yellow to brown ; tegulae dusky 

 brown, scutel dusky yellow with anterior margin black ; scapula 

 and propodcum yellow. Abdomen dusky yellow, with the anterior 

 third darker. Antennae yellow, scape somewhat paler, sparsely 

 setose. The relative length of the antennal segments may be 

 expressed by the following ratio: Scape 12, pedicel 5, funicle 

 joints I, ring joints 2.8, 2.8, club 9. Legs: coxae dusky yellow 

 to brown, front coxae lighter, trochanters, femora, and tibiae pale 

 yellow, tarsi dusky yellow, claws darker. Wings hyaline, 

 margined with long hairs except proximal half. Forward wings : 

 proximal area fumated from the base to the middle of the mar- 

 ginal vein on the forward margin, and to a point 1/3 of the 

 distance from the base to the apex on the hind margin ; minute 

 hairs of forward wings arranged in about 12 longitudinal rows; 

 the fumated area, except near its outer margin, and a circular 

 area caudad of the stigmal vein have no hairs ; the hairs near 

 the hind margin of the wing rather irregularly arranged ; mar- 

 ginal vein thickest and shortest, containing 2 long setae; sub- 

 marginal vein longest, and thicker at the distal third, containing 

 I long seta ; stigmal club with claw containing about 3 alar sen- 

 soria. Hind wings narrow, with angular evagination at distal 

 end of submarginal vein, which bears 2 booklets; marginal hairs 

 of the hind and cuter margins much longer than those of the 

 anterior margin of the wing, and a little longer than the longest 

 of the forewings. 



The male may be distinguished from the female chiefly by 

 the structure of the antennae, the funicle of the former sex, 

 with the exception of the ring joint (annulus), having prominent 

 lonof setae and the club consisting of three segments. 



Trichogrammatoidca lutca may be distinguished from 

 Trichogramtna niiitutiiin. the common codling tgg parasite of the 

 United States, by the fact that the forward wing of the latter 

 has a transverse row of small hairs extending caudad from the 

 stigmal club, and scattered small hairs between the longitudinal 

 rows of small hairs. The antenna of the male T. lutea has a 

 club of only one segment, which is joined to the funicle seg- 

 ments. 



