affecting the Corn- Crops. 
507 
numerous: it has also been remarked by Mr. Haliday, that the 
Epliedrus pierces the hacks of" tlie Aphides to deposit her eggs, 
whereas the Apliidius punctures the under side for the same pur- 
pose.* I cannot refrain from remarking the singular fact, that so 
few males are found in some species of Aphides ; and amongst the 
horny punctured ones, not one of that sex have I detected upon 
the wheat. Their services are thus rendered more effective, as the 
prolific females not requiring sexual intercourse for several genera- 
tions, the destruction of one individual of that sex prevents many 
thousands from making their appearance in the course of a few 
months. 
The third species of insect I bred does not destroy tlie Aphides, 
but infests the Ephedrus : it belongs to the Family Proctotru- 
piD^ or OxYURi, and many years since I described it under the 
name of 
9. Ceraphron Carpenter!. f It is black and shining ; head and 
thorax finely punctured and clothed with minute hairs : the Male 
has a broad head; the eyes are lateral; ocelli 3 on the crown in 
a curved line : antennae inserted near to the mouth, longer than 
the body, ll-jointed, geniculated, bristly and serrated, basal joint 
elongated, second minute, third and five following obtrigonate, the 
internal angles pointed, the remainder elliptical: thorax obovate, 
as broad as the head, with three longitudinal striae; scutellum 
ovate; metathorax with the hinder angles toothed: abdomen 
smaller than the thorax, very shining, ovate-conic, depressed, 
attached by a broad but very short pedicle, composed of seven 
joints, the first covering more than half tlie body, the base striated : 
four wings transparent ; pubescent very iridescent ; anterior with 
a thick pitchy costal nervure, terminating beyond the centre in an 
oval horny stigma, from which issues a longish curved ray : legs 
pitchy, tips of anterior thighs with their tibiae and the base of the 
other tibiae bright ochreous ; tarsi more or less ochreous-brown, 
five-jointed, basal joint long ; claws and pulvilli distinct (fig. 22; 
d, the natural size). Female larger, the antennae scarcely so long 
as the body, not serrated nor hairy, but clavate and eleven-jointed 
(fig. e), basal joint longer than the head, second and third of equal 
lejigth and slender, two or three following obtrigonate, the remainder 
slightly oblong, the apical joint conical : abdomen as large as the 
thorax and acuminated at the tip, composed apparently of two 
horizontal valves. 
1 bred one male and several females from the wheat ears, and 
these select those Aphides which have been already occupied by 
' Ent. Ma^., vol. i. p. 48G. 
t Curtis's Brit. Ent., Ibl. 249, and Dissections in pi. 249 ; Curtis's Guide, 
Genus 581-7 ; and Journ. Roy. Agi-. Soc, v. iii. p. 59. 
VOL. VI. 2 M 
