. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. PARASITES OF GIPSY-MOTH CATERPILLARS. 199 In some instances they appear to be identical. In others it may be possible to find minor structural characters which, together with the difference in their habitat, will make it worth while to designate them by different names. Some very distinct species are peculiar to Europe or to Japan, and remain unrepresented by any nearly resem- bling them in the other country. In 1909, as the immediate result of colonization work carried out under the happy auspices already descri
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. PARASITES OF GIPSY-MOTH CATERPILLARS. 199 In some instances they appear to be identical. In others it may be possible to find minor structural characters which, together with the difference in their habitat, will make it worth while to designate them by different names. Some very distinct species are peculiar to Europe or to Japan, and remain unrepresented by any nearly resem- bling them in the other country. In 1909, as the immediate result of colonization work carried out under the happy auspices already described, it was possible to collect large numbers of Apanteles fulvipes cocoons under perfectly natural conditions in the open in America. This was accordingly done, with the result that no less than 18 additional hyperparasites were added to the list of those which attacked this host. Some of these were rare, others very common in this connection. A few appear to be undescribed. The most interesting thing about them taken as a group, is the general resemblance which they bear to the similar groups of Euro- pean and Japanese parasitic Hymenop- tera having identical habits. Appa- rently there are about as many points in common between the American para- sites of Apanteles fulvipes and the Japa- nese or the European as there are be- tween the European and the Japanese. In the course of the work a total of 5,456 cocoons of Apanteles fulvipes was collected from several of the recently established colonies, but principally c ^^ T \d from two, representing the first among fulvipes: cocoons from those planted in 1909 and in both of which APanteles and its secondaries , . , , . , have issued, as follows: a, Apanteles ful~ which a second generation occurred. vives; &) Hypopteromaius; c, Hemiteies Of this total, 1,531, or 28 per cent, had *ȉ ; d> wbrachys; e, Asecodes. En- produced the Apanteles at the time of collection; 2,373, or 44 per cent, were attacked by
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