27 



or five terminal joints, and the legs, except the front coxae and more 

 or less of the front femora or at least above, testaceous or brownish- 

 yellow : front coxae and front femora black or dark brown in part, the 

 latter sometimes brownish only above or outwardly ; wings hyaline, the 

 parastigma and the stigma brown or fuscous, the other veins pallid or 

 pale yellowish. 



"The head is distinctly longer than wide, with an acute ridge anteriorly 

 between the insertion of the antennae, and clothed with a short, sparse 

 pubescence. The antennae are much longer than the head, all the joints 

 of the flagellum being distinctly longer than thick or from i^A to 2 times 

 as long as thick. 



"Male. Length about 2 mm. Black: two or three basal joints of the 

 antennae and the legs, flavo-testaceous, the rest of the antennae being dark 

 fuscous or black. The anterior femora above or outwardly and some- 

 times the front coxae, more or less, are brow'u or fuscous. The joints 

 of the antennae 5 to 6 are oval and very little longer than thick, joints 

 IT and 12 being moniliform. while the abdomen is oblong-oval, not longer 

 than the thorax.'' [Ashmead, Fauna Hawaiiensis, I. Pt. Ill, p. 290. 1901.] 



Of a lot of cocoons of the bticl worm collected in March, 1908, 

 S^YsVc were infested with, this little Bethylid. Some contained 

 the Sicrola larvae feedino; upon the bnd worm ; and one contained 

 adult Sierolas which were all ready to emerge. The number per 

 cocoon varied from two to eight. The larvae feed externally 

 on the bud worm. Probably the adult Sicrola stings the cater- 

 pillar after it has made its cocoon, paralyzes it and lays eggs in 

 or upon it. The larvae get their growth in a few days (as with 

 other parasites which feed upon paralyzed caterpillars). They 

 are plump footless maggots, somewhat curved, nearly transpar- 

 ent, with numerous white dots in their body-wall. When full- 

 •grown they are abottt 3 mm. long. Thev then spin loose brown- 

 ish cocoons occupying all the space inside the cocoon of the bud 

 worm. The pupa stage is passed through in about a week. 



The parasite breeds more rapidly than the bud wornr. It 

 should eventually be a valuable parasite on the bud worm. I 

 first bred one from cane bud worm in May, 1906, and at the time 

 there was some doubt as to whether it was really from the bud 

 worm or not. I have made no observations on it again till 

 recently, though I have occasionally taken a specimen in cane, 

 :and have occasionally found bud worms parasitized by it. 



