ENTOMOLOGY HYMENOPTERA. 367 



being conical and thickly covered with decumbent, long hairs ; T. erythroph- 

 thiiliiius, bred from fir-cones, infested by Tortrix strobilana, from the Ilarz, 

 all males. [The genus is founded on the males alone (with hairy feelers) of 

 the genus Tetrastich-its, Hal. (see Report 1843, p. 172), other species of 

 which Ratzeburg has included in Eulophus, and has figured one of them (pi. 

 8, fig. 1), as an example of that genus, along with the parts of the mouth, 

 which are peculiar, in having the palps of a single joint (f. 1, b-d). The 

 description of Ti: erytliroplithalmus is not particular enough to determine 

 whether it may not be one of the 130 species of Tetrastich.ua described by 

 Walker, as found in England.] 



3. Stylocerus, distinguished from Pteromalus by the feelers of the 5 

 ending in a style, and by the wings, which have the stigmatical vein (" dop- 

 pel-nerv") remarkably short and thick, as in Eurytoma, the radial much 

 longer and slighter, suddenly ending in an oval knob ; two species, Pterom. 

 subidifer, Fdrst., and St. ladenbergii, new species, bred out of Hylesinus 

 fraxini. [The genus has been characterized already; it is Rhaphitelus, 

 Walk., and St. subidifer, Forst., == Eh. immaculatus, Walk. (Ent. Mag. ii, 

 178 ; Entomologist, pi. A, f. 2.)] 



4. Bothriothorax : Head and thorax coarsely and deeply pitted, wings and 

 breast as in Eucyrtus (it is not specified whether the middle pair of legs are 

 formed for leaping) ; one species, B. altensteinii, bred out of a Syrphus by 

 Saxeseu. [This is nothing more than Eucyrtus clavicornis, Dalm. ; and a 

 simple gradation in sculpture has not hitherto been admitted as sufficient 

 ground for the separation of a genus.] 



5. Hylothorax, a well-marked genus, with the hind thighs enlarged,* [as 

 in Chalcis], to which it comes near, but there is no trace of the radial vein ; 

 H. graffii, bred out of the larva of Myrmeleon by Graff ; [appears related to 

 the remarkable West Indian genus Notaspis, Walk. (Entomologist, pi. F, 

 f. 1), concerning the habits of which nothing is known.] 



6. PacJii/cerus (name of a Coleopterous genus) : Radial vein, sculpture of 

 the trunk and shape as in Pteromalus ; abdomen as in Torymus ; borer pro- 

 truding, long ; feelers short and thick, the lash of nine joints : 1. P. yylopha- 

 gorum, the larva of which was observed, by Saxesen, sucking the grubs of 

 Bostrichi from the outside ; 2. P. eccoptoyastri, bred out of Ecc. intricatus ; 

 [seems to come near the genus Gastrancistrus, Westw., if they be not iden- 

 tical. Of new speciesf he gives further under Eurytoma 5, Torymus 12 (of 

 which three belong to the group with toothed hind thighs, genus Diomorus, 



* Qualified by "slightly" in the text, on what grounds I do not 

 know. TR. 



f The new species of Cleonymus referred to in the text I cannot find. 

 TR. 



