66 Mr, Ernest A. Elliott and Mr. Claude Morley on the 
264. Taphrorychus bicolor, Herbst. 
Ratzeburg records from Bostrichus bicolor (lib, cit. 11,211), 
Roptrocerus xylophagorum (ii, 209), bred by Wissmann, 
and Pteromalus multicolor >® 
265. Tomicus. 
From unspecified individuals of Sostrichus, the above 
author (/.¢ 1, 28 et 1, 211) imstances Pteromalus spinolex, 
P.suspensus, P. bimaculatus,and Pachyceras xylophagorum 3.8 
266. Zomicus laricis, Fab. 
Giraud bred Diapria clegans,*§ Jur. et Nees (Ann. Soc. 
Fr. 1877, p. 435), from Bostrichus laricis; from which 
Ratzeburg further records Bracon palpebrator (Ichn. d. 
Forst. ii, 389), Roptrocerus xylophagorum, Pteromalus 
suspensus (1, 189 et 11, 193), bred by Nordlinger from the 
larve at Hohenheim and Neustadt, P. virescens®” and 
perhaps P. emulus. 
267. Tomicus typographus, Linn. 
“M. L. Dufour detected great numbers of minute 
Ascarides,” says Westwood (Mod. Class. i. 354), “in the 
entrails of 7. typographus, as well as numbers of small 
mites on its external surface”; for latter, cf. footnote to 
Scolytus destructor, ante. Possibly these latter may have 
been the larve of Pteromalus spinole or Pachyceras 
xylophagorum,*'® both of which Herr Saxesen discovered 
(Ichn. d. Forst. 1, 189 et 218) to be ektoparasitic upon the 
larvee of Lostrichus typographus and Hylesinus palliatus in 
spruce ; the former, he says, are probably the commonest 
and most effective foes of these two beetles; the latter were 
also numerous in the Hartz. Ratzeburg raised from this 
borer Pteromalus multicolor *° and perhaps Bracon oblitera- 
tus,” (7. ¢. 11, 212), And Giraud adds (Ann Soe. Fr. 1877) 
Celoides bostrichorum, Gir., Roptrocerus xylophagorum, 
Acrocormus multicolor, Ratz., and Pteromalus abieticola, 
Ratz., to its parasites. 
268. Tomicus curvidens, Germ.* 
From Lostrichus curvidens in blocks of white fir, Radzay 
bred (Ichn. d. Forst. ii, 141) Ceraphron pusillus #2 and 
Nordlinger found (ii, 209) Roptrocerus xylophagorum to be 
parasitic upon the same species. 
