48 REPORT ON INJURIOUS INSECTS FOR 1904. 



Female. Average length, exclusive of ovipositor, about 

 3.4 millim., the ovipositor, when extended, being longer than 

 the rest of the body ; expanse about 7 millim. Antennae normal 

 14-jointed (2 by 12), slightly longer than the head and thorax 

 together, the two basal joints as in male ; joint 3 longest, almost 

 as long as 4 and 5 together ; the rest of about equal length, cylin- 

 drical, slightly thickest anteriorly, with rounded tips and some- 

 what truncated bases ; the pedicels of joints 4 to 7 somewhat 

 shorter than the others ; apical nipple shorter than the apical joint 

 In genera], somewhat lighter in colour than the male ; the ex- 

 tended ovipositor lighter than remainder of the abdomen. 



DESCRIPTION OF THE LARVA. 



" Length, 4 to 4.5 millim. Colour, pale yellow. Surface 

 polished and very faintly reticulated. Breastbone pale brownish, 

 its apex broadly bilobed. Body (13 joints and subjoint) 14- 

 jointed, exclusive of the head. Antennae 2-jointed. Anal sub- 

 joint much narrower laterally than the penultimate, slightly 

 concave, the concavity beset with 6 (3 each side) small fleshy 

 tubercles, of which the second one on each side is stoutest, those 

 on the external angles bearing each a short spine. Spiracles nor- 

 mally placed and mounted on tubercles." 



DESCRIPTION OF PUPA. 



" Average length about 3 millim. Head, thorax, legs and 

 wing-cases blackish, abdomen yellow. Head and thorax together 

 about as long as the two basal joints of the abdomen. Front of 

 head conical, acute, having each side, close to the eye, a stout 

 spine and two fine hairs dorsally. Another, somewhat curved 

 stout spine arises from the upper angle of the wing-cases which 

 reach to the third abdominal joint. Abdomen quite strongly 

 curved, the sutures rather deep, and containing dorsally a some- 

 what semi-circular, scale-like piece, covered with minute retrouse 

 spines ; tip unarmed and bluntly rounded. Exuvium without 

 special significance, the antennal sheaths remaining very much in 

 the normal position." 



PARASITES AND ENEMIES. 



Although I have reared many broods, I have never found 

 any parasitic species, nor do I know of any natural enemies. 



Schmidberger ( ! ) records finding "several gold shining 

 Hymenopterous insects " which were parasitic on the Pear 

 Midge, to which he gave the name of Diplolipis cecidomyiae. Dr. 

 Riley ( 2 ) also states that in a breeding jar containing infested 

 pears, he found three specimens of an undetermined species of 



1. In Kollar, p. 300. 



2. Op. cit., p. 285. 



