April, '13] COCIvERELL: A NEW GALL ON PERITOMA SERRULATUM 279 



brown, the submedian lines fuscous yellowish. Scutellum and postscutellum fuscous 

 yellowish. Abdomen sparsely haired, dark brown. Wings hyaline, costa dark 

 brown. Halteres dark reddish, yellowish basally. Coxse fuscous yellowish, the 

 legs mostly dark brown, the tarsi nearly fuscous; claws simple, the pulvilli about ^ 

 the length of the claws. Genitalia; basal clasp segment narrowly oval; termmal 

 clasp segment short, stout; dorsal plate short, divided, the lobes cordate; ventral 

 plate longer, broad, triangularly emarginate, the lobes obliquely truncate; style 

 short, stout. 



Female. Length 2 mm. Antennae f the length of the body, sparsely haired, 

 fuscous yellowish; 14 subsessile segments, the fifth having the basal enlargement \yith 

 a length 2| times its diameter, the circumfiU stout and well elevated; terminal 

 segment produced, tapering, with a length thrice its diameter, obtuse apically. 

 Palpi; first segment irregular, second narrowly oval, the third j longer than the 

 second, more slender, the fourth f longer than the third. Abdomen reddish brown, 

 the short ovipositor yellowish. Halteres fuscous yellowish, fuscous subapically. 

 Coxse and femora mostly fuscous yellowish, the tibiae and tarsi a little darker. 

 Ovipositor about half the length of the abdomen, the terminal lobes lanceolate, with a 

 length thrice the width, sparsely setose. Other characters practically as in the male. 

 Tj^pe Cecid. a2120. 



A NEW GALL ON PERITOMA SERRULATUM 



By T. D. A. COCKERELL 



Galls on Capparidaceous plants appear to be scarce. Houard, 

 in his great work on European galls, cites only two: one, Lepidopterous, 

 on Capparis cegyptiaca, the other, Dipterous, on Capparis spinosa. 

 The former consists of a globular enlargement of the stem; the latter, 

 due to Asphondylia capjiaris Ruebs., is a deformed and hypertro- 

 phiecl flower-bud. It appears worth while, therefore, to bring 

 forward a quite different gall from Capparidacese, consisting of a 

 deformed and. enlarged pod, in which Dipterous larvae live in great 

 numbers. 



Fig. 2. Cecidomyia peritomatis ; a, galls; 

 b, breastbone of larva (original) . 



