41 



and the tobacco split-worm {Phthoriinaea operculella) . Of a lot 

 of the former caterpillars collected in Honolulu for rearing, para- 

 sites l)red out from 14%. Dr. Perkins has also Ijred this parasite 

 from Phlyctaenia despecta. 



The parasitized caterpillar spins its cocoon when only al)()ut 

 half grown (tho it may be tlie same age as a normal full-grown 

 unparasitized one), but it does not pupate. In a day or two the 

 half grown larva of the parasite emerges from the caterpillar and 

 feeds upon it externallj', finisliing it in a day or two (Plate VI, 

 figs. la-d)k. When full grown it is a thick, j^ellowish-white grul) 

 about 5 mm. long, somewhat tapering toAvards the anterior end, 

 which is curved ventrally. It spins a delicate white cocoon inside 

 the host's cocoon. The pupa is about 3 mm. long, whitish, with 

 l)rown eyes. Before changing to adult stage it turns black, except 

 the base and venter of abdomen. They are adult in al)out 2 

 weeks from the time the host caterpillar spun its cocoon. 



Echtliroinorpha macnlipcnnis Holmgren. (Plate Y, fig. 0). 



"9. Length 12 to 16 ram.; ovipositor about half the length of the 

 abdomen, or a little less. Black, punctate, the abdomen, except the 

 first segment which is smooth and shining, closer and more strongly 

 punctate, the scutellum convexly elevated, nearly smooth, the post- 

 scutellum smooth, impunctate, but with two foveolae, the posterior face 

 of the metathorax polished, impunctate, but with some faint, transverse 

 aciculations towards sides, towards the base and the pleura strongly 

 punctate. Mandibles toward base and the anterior femora beneath and 

 toward apex, their tibiae and tips of tarsal joints rufous ; rest of legs 

 black. The head is transverse, thin antero-posteriorly, the temples being 

 flat, not developed, the face above the insertion of the antennae concave, 

 the basin being smooth, except some faint aciculations or wrinkles; 

 below the antennae the face is feeble convex, sparsely punctate but 

 shining; the clvpeus is large, smooth, the labrum slightly exposed, 

 yellowish ; palpi yellowish ; ocelli pale. The wings are hyaline, with a 

 small black spot 'almost at the extreme apex of the front wings, the 

 stigma and veins black, except the longitudinal veins at their origm, 

 which are testaceous. The abdomen is similar to that in Pimpla (sens, 

 str.), the dorsal segments 2 to 6 with a transverse impressed line at apex, 

 which is more or less obsolete medially, and with segments 2 to 5 also 

 with an oblique line on each side extending from the base to the apical 

 transverse line, the apical portion of the segments beyond this Ime bemg 

 smooth. 



