42 



" ^ . Length 7 to 14 mm. Agrees in every respect with the female, 

 except that it is smoother, feebly, sparsely punctate, the antennae longer, 

 the abdomen elongate, slender, the first and second segments polished, 

 impunctate, while the following segments are also polished but with 

 some sparse, feeble punctures." [Ashmead, Fauna Hawaiiensis, I, Pt. 

 Ill, p. 336, 1901.] 



This large native leliiieiinioiiid uecurs (jn all the islands of the 

 Hawaiian group. It is usually found in the forests of the moun- 

 tains; hut it also often oeeurs very ahundant locally at lower 

 elevations, preying upon palm leaf-roller {Omiodes blackburnt) ^ 

 and Phisia chalcites when tliese caterpillars are abundant. Of a 

 large number of pupae of the latter species, collected in Feb., 1907, 

 54% were parasitized by this parasite. Beside the above liosts, I 

 have also reared this parasite from pupae of the cane leaf-roller 

 {0)ntodcs accepia) , Cacoecia sp., and the Kamehameha butterfly 

 i^Vanessa taviehameha) . \\ no doubt parasitizes manj^ species 

 of moths, and is of great value in keeping these in check. 



Life History 



The eggs of this parasite are inserted in tlie i)upa of its host. 

 The female by her str<tng ovipositor pierces the folded or rolled- 

 together leaf within which is the pupa of its host and inserts an 

 egg witliin the pui)a. 1 have observed them thus i)ierciiig the 

 "retreats" of O. accepta, O. blackburni ^ and cocoons of Pliisia 

 chalcites. The egg soon hatches and as a footles grub consumes 

 the juices of the pupa, and when full-grown spins a slight cocoon 

 inside tjie pupa and in contact with its wall. Within this cocoon 

 it pupates, and in al)OUt S days becomes matured and gnaws its 

 way out at tlie antt'rior part of the i)upa. It is an interesting 

 fact that in the large nuni1)er of specimens 1 have examined, the 

 head of the pupa of the i)arasite is always towards the anterior 

 end of the host pupa. 



Pimpla haivaiiensis Cameron. (Plate \', tig. o). 



" ^ 9 . Length 5.5 to 10 mm.; ovipositor less than one-half the length 

 of abdomen. Black; legs red, the anterior tibiae inclining to yellowish 

 in front, the hind tibiae and tarsi black, the extreme base of hind tibiae 

 and a broad band above the middle and the spurs white ; the tips of 

 four anterior tarsi black ; extreme base of posterior testaceous. Antennae 



