681 



SwEZEY (0. H.). Some Hyperparasites of White Grubs. — P/w. 

 Hmvaiian Entom. Soc, Honolulu, iii, uo. 2, January 1914 — April 

 1915 July 1915, pp. 71-72. [Received 18th September 1915.] 



Experiments in attempting to induce Elis sexcinda to parasitise 

 the grubs of Anomala and Adoretus proved negative. From the 

 cocoons of E. sexcinda received, some males and one female emerged ; 

 the latter lived for several weeks, but failed to parasitise any of the 

 larvae supplied. Two Mutillids and one I^ombyliid emerged from 

 the cocoons of E. sexcinda, and it is concluded that they are hyper- 

 parasites of white grubs, presumably Lachnosterna sp. The Bombyliid 

 proved to be Anthraxfulvohirta, Wied., and the Mutillids were identified 

 as Mutilla castor, Blake, and M. ferrugata, F. 



SwEZEY (0. H.). A Preliminary List of the Hymenopterous Parasites 

 of Lepidoptera in Hawaii. — Proc. Hawaiian Enlom. Soc, Honolulu, 

 iii, no. 2, January 1914— April 1915, July 1915, pp. 99-109. 

 [Received 18th September 1915.] 



Hymenopterous parasites play an important part in checking 

 Lepidoptera in Hawaii. Some species of moths, however, are abundant 

 in the momitains, frequently causing the defoliation of the plants they 

 attack. This may be due to the fact that the relationship between 

 insect parasites and their hosts is usually such that there is a variable 

 ratio in numbers between parasite and host, depending on conditions 

 which are more favourable to one or the other. 



The parasites recorded include : — (1) Bethylidae : Sierola molo- 

 hiiensis, Ashm., reared from Ereunelis fiavistriala, Wlsm. (sugar-cane 

 bud- moth) ; the eggs are deposited on the larva of the host ; the 

 larvae reach maturity in a few days, feeding externally on the host ; 

 S. jlavocollaris, Ashm., from Aristotelia elegantior, AVlsm., a Gelechiid 

 occurring in the fruits of Gouldia coriacea ; Parasierola sp., from 

 Gelechia gossypiella, Sndrs. ; Cephalononiia sp., from Ejjhestia 

 elulella, Hb. (2) Chalcididae : Chalcis obscurata, Walk., introduced 

 from Japan to attack the Pyralids, Nacoleia blackburni, Butl. (palm 

 leaf-roller) and N. accepta, Butl. (sugar-cane leaf-roller) ; it also 

 attacks Phytometra (Plusia) chalcites, Esp., Amorbia emigratella, 

 Busck, Gelechia gossypiella, etc. ; Chalcis polynesialis. Cam., reared 

 from the pupa of Homoeosoma humeralis, Butl., and probably parasitic 

 on other Phycitids, such as flour moths ; Hockeria sp., reared from 

 pupae of Ejjhestia elutella and Corcyra cephalonica, Stn., (cereal moths), 

 Pyralis mauriticdis, Boisd., and Gelechia gossypiella (pink cotton-boll 

 worm). (3) Encyrtidae : Eupelmus dysombrias. Perk., from 

 Phlyctaenia ommatias, Meyr., and Eupelmus spp. from Aristotelia 

 elegantior, A. niendax, Wlsm., Semnojyrepia sp., etc. (4) Eulophidae : 

 Otnphale metcdlicus, Ashm., from Aristotelia sp. n., Gracilaria spp., 

 Bedellia orchilella, Wlsm.. etc. ; Melittobia hawaiiensis. Perk., from 

 Ereunetis jlavislriata, Wlsm. (5) Trichogrammatidae : Trichogramma 

 favum, Perk., from the eggs of Vanessa tamtneamea, Esch., Nacoleia 

 accepta, Tortrix (Archips) postvittanus. Walk., etc. ; this is a very 

 beneficial parasite, the life-cycle is very short, a minimum of 10 days 

 having been obtained; T. semifumatum, Perk., from the eggs of 



