45 



caterpillar had for a hiding-place. The cocoon is of two layers; 

 the outer one is slight, of brownish silk and closelj^ encloses the 

 inner one, whieh is strong and papery and blackish in color. 



Sierola di chroma P., MSS. 



This native Bethylid I have bred from a caterpillar of Omiodes 

 asaphombra, in the mountains above Palolo, Oahu. The larvae 

 feed on the exterior of the caterpillar whicli has l)een stung and 

 paralyzed l)y the adult parasite. They grow rapidly, and having 

 tinislied, spin cocoons in a mass near the remains of the cater- 

 pillar. In the instance above mentioned, 9 larvae fed upon one 

 caterpillar, and the}' spun their cocoons obliquely side bj^ side in 

 a mass. They were light l)rown and the individual cocoons did 

 not show conspicuously from the exterior of the mass. 



There are several species of Sierola in the Hawaiian Islands. 

 They ar(^ all probably parasitic on caterpillars. What appears to 

 be .S*. violokaiensis I have bred from a species of Cacoeciid cater- 

 pillar which feeds on a native tree, Myrsine. Mr. Perkins has 

 bred a species from a Tineid caterpillar which is related to the 

 " bud worm "in sugar cane. I have taken a species of Sierola 

 in the sugar cane of the Experiment Station groiuids, un<ler 

 circumstances Avhich indicated that it was parasite of the sugar 

 cane " bud worm." 



Chalcis obsiirata Walker. 



"Body, antennae and legs black, with the usual structure. Body- 

 convex. Head and thorax scabrous, dull. Antennae stout, nearly 

 filiform. Prothorax about four times as broad as long. Sutures of the 

 parapsides distinct. Abdomen smooth, shining, subsessile, with ciner- 

 eous tomentum towards the tip. Femora yellow at the tips, hind femora 

 minutely denticulate beneath. Tibiae yellow beneath, striped beneath 

 with black ; hind tibiae black at the base. Tarsi yellow, tips black. 

 Wings cinereous ; squamulae yellow ; veins black; ulna about as long as 

 the humerus, (Walker)." [Ashmead, Fauna Hawaiiensis, I, Pt. Ill, 

 p. 307, 1901.] 



This is our largest Chalcid. It was originally described from 

 Japan, and also occurs in China. It was introduced to the 



