30 PSYCHE [April 
the eye margin and about one-fourth farther apart than each is from the cephalic 
ocellus and on or very near the occipital margin; proximal segment of the abdomen 
sordid yellowish. Pubescence of head and thorax black. Proximal intermediate 
tarsal joint longer than the combined length of the two next joints following. Sub- 
marginal vein narrow, dark, the marginal broader, pallid yellow. 
Antennae 6-jointed, the scape short and slightly dilated, nearly as long as the 
funicle and pedicel combined, or twice the length of the pedicel; the latter obconic, 
slightly longer than the third funicle joint, or over half the length of the funicle; 
joints 1 and 2 of the funicle like ring-joints, subequal, joint 2 larger, both about one- 
third narrower than the pedicel and combined not as long as the third funicle joint, 
which is quadrate-oval and as wide as the unjointed club. The latter longest, 
subequal to the scape and longer than the funicle, ovate. Antennae inserted below’ 
the middle of the face, with very few hairs. 
Mandibles quadrate-rectangular, bidentate, the outer (lateral) tooth short and 
moderately acute, triangular, the inner (mesal) one longer, four times broader and 
broad and truncate. 
(From 20 specimens, 3-inch objective, 2-inch optic, Bausch and Lomb.) 
Male: — Unknown. 
Described from 20 females reared from November 16 to December 18, 1908, by 
Mr. John J. Davis in the insectary of the office of the State Entomologist of Ilinois, 
from about the last three stages of the viviparous females of Schizoneura crataegi 
Oestlund on Crataegus, Chicago, Illinois. The hosts were collected on October 17th, 
1908, in Garfield Park, by which date nearly all of the parasites had emerged; 13 
of the specimens obtained emerged in the insectary at Urbana between November 
16 and December 10, 1908, and the remaining 7 specimens between the latter date 
and December 18, 1908. ‘The description was made from specimens mounted 
in xylol-balsam, tag-mounted and from living specimens stupefied with chloroform. 
‘This species is very closely allied to A phelinus mali (Haldeman) both in habits, 
structure and coloration and is very probably a variety of it, but until that point is 
settled by careful breeding, both expediency and progress demand that it should be 
given a name, and between the two grades of species and variety, I prefer to place it 
in that of the former, as being the less hazardous of the two. 
Hosts parasitized by this parasite change to a deep pruinose blackish color and 
become considerably swollen and the caudal part of the abdomen is slightly elevated 
above the surface; the parasites are solitary and issue usually from circular holes in 
the dorsal or dorso-lateral aspect of the proximal end, or of the center, of the abdomen 
of the host; some of the emergence holes are, however, jagged and irregularly elongate. 
