58 Mr. Ernest A. Elliott and Mr. Claude Morley on the 
of Ichnewmon nanus* (Ichn. d. Forst. u, 133) out of elms 
infested by this borer, from Radzay, who also bred a single 
2 Hemiteles modestus'*® (i, 129) from the same _ host, 
together with a quantity of both sexes of Bracon initia- 
tellus (11, 39). B. Middendorffiis” B. minutissimus ?§ and, 
B. protuberans*® are also given (ii, 214) as preying upon 
this species. Both Radzay and Nordlinger bred 
curtis, $9 (i, 32) sparingly from this weevil in elm; 
and the former further raised, from it a single 2 Spathius 
exannulatus" (ii, 42). Elachestus leweogramma (uu, 174) 
was bred by Nordlinger at Grand Jouan in June from a 
mixed lot of #. scolytus, #. intricatus and F£. multistriatus, 
as well as by Radzay in Germany from JL. scolytus only 
together with a single Pteromalus capitatus (i, 196); 
Nordlinger also bred at the same time and place Ptero- 
malus bimaculatus and P. brunnicans (1, 188) from this 
beetle. An unusually large and untypical 2 of P. /uwnula 
Gi, 193) was raised from it by Wissmann; and Radzay 
added P. vallecula (11, 206) and P. lanceolatus (11, 207) to 
its list of parasites from Falkenberg in Silesia. Scolytus 
destructer is further attacked (cf. Ann. Soc. Fr, 1877, p. 
414) by Coloides scolyticida, Wesm., and—“Scolytus de 
’Orme ”—by Cerocephala cornigera, Westw. “And Mr. 
Spence has also observed the larve and pup to be 
infested to a great extent with minute worm-like 
OXYURIDES ” (Westwood, Mod. Class. 1, 255). 
1 “Tt may be here mentioned, though somewhat out of place, for 
the purpose of drawing the attention of Entomologists to a new 
tribe of insect-parasites of which no account appears to have been 
given in books, that in examining closely the pupz of Scolytus 
destructor at Brussels, I found them lined in different parts of their 
external surface, but especially on the thorax and about the cases of 
the elytra, with numerous transparent eel-shaped vermicles. . . 
The vermicles, under M. Wesmael’s powerful compound microscope, 
with which he was so good as to assist me in examining them, exhibit 
not the slightest trace either of mouth or other external organ, nor of 
intestines, nor of internal vessels of any kind, which, if any such 
existed, might be easily seen through their transparent skin and body. 
This absence of all external and internal organs (the inside of the body 
seeming filled with granular molecules), added to their shape, which is 
filiform and very slender, sharply attenuated at each extremity, and 
their hyaline colour, with very indistinct traces under a high mag- 
nifying power of about twenty segments, each as long as broad, are 
all the characters they afford. ... From their connection with an 
animal, they might be regarded as referable to the OxyuRI, were it 
not that neither my own nor M. Wesmael’s close examination could 
ever discover any trace of their existence in the interior of either 
