1934] A Psychid New to North America 29 
may be due to some peculiar habit of the female in choos- 
ing different or more concealed places for pupation than the 
males, thus rendering their cases less liable to detection by 
the collector. 
Parasites. Apparently Fumea casta has become estab- 
lished in America without its European parasites. Al- 
though the writer reared over 2,000 adult moths from cases 
collected at the time of attachment, only eleven parasites 
emerged from the material, and probably all eleven of these 
emerged from a single host. They proved to be a new spe- 
cies and genus of Eulophidse related to Elachertus, as yet 
undescribed. Several hundred cases collected in Massachu- 
setts were sent to Dr. Jones, and from them he reared 
eleven specimens of Dibrachys boucheanus (Ratz.) [A. B. 
Gahan]. Dr. Jones also reared two specimens of Itoplectis 
conquisitor (Say) [R. A. Cushman] from cases collected in 
the Morris Arboretum in Pennsylvania. 
In addition to these definite instances of parasitism, two 
species were found in the field associated with Fumea 
casta : A female of Ephialtes equalis (Prov.) [R. A. Cush- 
man] was taken in the field with its ovipositor thrust 
through a bag attempting to oviposit in the contained pupa. 
A specimen of Eunotus lividus Ash. [A. B. Gahan] was 
found in a tube in which cases of casta were being collected, 
and probably gained entrance to the tube by being on or 
within one of the cases when it was collected. 
Explanation of Plate 2. 
Fig. A. — Adult females on their bags (x2) . 
Fig. B.— Adult females (x2). 
Fig. C. — Adult males (x2}4). 
Fig. D. — Bags from which adult males have emerged leav- 
ing their empty pupa-shells protruding from the 
bags (x2i/ 2 )- 
Fig. E. — -Bags attached for pupation on a stone wall in a 
heavy infestation (Vs natural size). 
Fig. F. — Adult males (xBVs)- 
