158 THE ENTOMOLOGIST. 
TueERoscopus, Foerst. 
A. Antenne bicoloured, base red, apex black (females). 
a. Ist abdominal segment with very projecting spiracles. 
Base of antenne, back of metathorax, apex of 1st segment, 2nd and 
3rd entirely, and legs, red-yellow. . 1. ingrediens, 14 line. 
b. 1st segment without or with very slightly projecting spiracles. 
* Ist and 2nd abdominal segments aciculate. 
Thorax, three first abdominal segments and legs more or less red. 
+ 2nd segment with a brown dorsal mark in front of the apex. 
4. inequalis, 1% line. 
++ 2nd segment entirely red; almost the whole of this segment 
aciculate. - - - - 2. esenbeckii, almost 2 lines. 
t Scutellum red ; middle of abdomen and legs red. 
3. subzonatus, 1} line. 
{t Scutellum black; middle of abdomen and legs red. 
5. pedestris, 2 lines. 
Bb. Antenne entirely dark (female). 
Almost entirely brownish black; legs brownish red; aculeus about 
half of abdomen. - - - - - niger, 24 lines. 
T. niger, Bridgm., is described at Trans. Ent. Soc. Lond., 
1883, p. 152, from a specimen taken by Mr. Cameron at Kingussie. 
The unsatisfactory definitions of the genera of these interesting 
brachypterous female Cryptide are there commented upon; also 
compare Ent. Mo. Mag. v. 155. JT’. pedestris is figured by Tappes 
(Ann. Soc. Ent. France, 4th ser., vol. ix., pl.1., fig. 15) from a 
specimen bred by Rosenhauer from the case of Cryptocephalus 
12-punctatus. In Vollenhoven’s ‘ Pinacographia,’ T’. cingulatus, 
Foerst., T’. essenbecku and T’. pedestris are beautifully figured, 
with details (J. c., pl. 37, figs. 5-7). All the species of Theroscopus, 
whose economy is known, are doubtless hyperparasitic, as Ratze- 
burg distinctly states that he bred his 7’. gravenhorstu from the 
cocoon of Ophion merdarius, Gr., which was parasitic on Trachea 
piniperda (Die Ichn. i. 154). Giraud bred 7’. inequalis, Foerst., 
from the galls of Diastrophus scabiose.* Hartig bred T. pedestris, 
Fabr., from Microgaster cocoons parasitic on Lasiocampa pini.* 
This species has also been bred from the following varied 
hosts :-—Psyche opacella by Brischke, Psyche calvella and Fumea 
intermediella by Siebold, Cryptocephalus 12-punctatus* by Rosen- 
hauer, and Hypera plantaginis by Schrank. 
