146 Psyche [August 



HOSTS OF INSECT EGG-PARASITES IN NORTH AND 

 SOUTH AMERICA. II.i 



By A. Arsene Girault, 

 The University of Illinois, Urbana, 111. 



The additional records of the hosts of insect egg-parasites in 

 North and South America given beyond, comprise those over- 

 looked previously (Girault, 1907) and those recorded in the lit- 

 erature during the years 1907 to 1910, besides a few as yet 

 unrecorded which are marked with an asterisk in the list to 

 follow. This paper should be considered as a sequel to the first 

 one, and the same arrangements hold here. 



Our knowledge in regard to the hosts of hexapod egg-parasites 

 is increasing rapidly, but as far as is yet known, no true insect 

 egg-parasites are other than hymenopterous^ and I have but two 

 additional groups to add to those given in 1907 (pp. 28-29), 

 namely the Tetrastichini and Miscogasterini of the Chalcidoidea'; 

 the former group may prove to be hyperparasitic on the primary 

 egg-parasites but certainly not always. Pentarthron minutum 

 (Riley) still maintains the lead as our most prominent, common 

 and widespread parasite of the eggs of insects, having to date 

 been recorded from thirty or more hosts in North America 

 as well as from several species of the pyralid genus Omiodes (mey- 

 ricki Swezey, blackburni [Butler], accepta [Butler]) in the Hawai- 

 ian Islands, where it was introduced by Albert Koebele about 

 1900 (Swezey, 1907, pp. 46-47); also in Java it attacks Diatroea 

 striatalis, and in New Zealand, Carpocapsa pomonella Linn. With 

 one or two exceptions, its hosts are all insects of the first economic 

 importance, such as the codling moth, the cotton bollworm, the 

 cotton-leaf caterpillar, the brown-tail moth, the West Indian sugar- 

 cane borer and so on. It stills confines itself to the Lepidoptera 



» Part I appeared in Psyche, Vol. XIV, pp. 27-39. 



2 1 am aware of the following sentences of Aaron (1890): "Finally, we must consider the 

 enemies of the Odonata. In the egg state we have found a small red mite, an Arachnid, which 

 skims rapidly over the water in search of an Odonat egg, upon which it either deposits an egg 

 or excavates it for immediate nourishment. A minute Dipteron, genus unknown, was also 

 seen to oviposit on the egg of Diplax." I know of a true dipterous parasite on Fidia egga, 

 observed by Mr. Paul R. Jones of the Bureau of Entomology, but unfortunately not reared to 

 maturity. See Johnson and Hammar, 1910, pp. 5.5- .57, fig. 26. As yet, however, no definite: 

 records of true dipterous egg-parasites are known to me. 



'Also perhaps the Pediobiini of the Entedoninse. 



