254 t^P"'- 



revision of the species. The references to the Stephensian species 

 are worked out from the descriptions, and they will, I think, be found 

 correct, although of course an examination of the types would have 

 been far more satisfactory ; but this I have not been able to do. I 

 have fortunately succeeded in rearing all the species, and this has 

 greatly simplified their identification, besides making it more sure. On 

 the other hand, I have not been at all successful in breeding the Civi- 

 hices, so that a revision of these must stand over until I have collected 

 more material. 



Trichiosoma lucorum, Linn., = Latreillii, Scalesi, and unidentatum, 

 Leach, pusillum and hiverrucatum, Ste. 



T. ietuleti, Kl., = tihiale, Ste. ; cratesgi, Zaddach. — Thomson con- 

 siders hetuleti to be a variety of lucoruvi ; but in this oj)iuion I do not 

 agree with him at present, because the earlier stages of the two are 

 not quite identical. At the same time I am open to be convinced that 

 the differences between them are not sufficiently great to warrant their 

 separation. Prof. Zaddach has renamed the species crataegi, as that is 

 a more appropriate name ; but as King's description is quite recog- 

 nizable, I do not think that his name (having the priority) should be 

 set aside, merely because the insect does not feed on birch, if that is 

 even always the case. 



T. sorli, Htg., Stett. Zeits., 1840, p. 20 ; Eatzeburg, Die Forstin- 

 secten, 136 ; Zaddach, Schrift. d. konig. physik.-okonom. Gesell. zu 

 Konisberg, 1862, 261, pi. ii, figs. 8 — 10 ; Thoms., Hymen. Scand., i, 

 23, 1. 



T. vitellines, Linn., = sylvaticum and laferale, Leach, 



JPcecilosotna puttatum, Fall. — Thomson (Hymen. Scand., i, pp, 

 231 — 233) has split up the Tenthredo guttata of Fallen (impressa, Kl.) 

 into four species, which he names guttata, longicornis, siibmutica, and 

 excisa. Of these, I have been able to identify as British, giittatum, 

 stibmuticum, and excisum ; but I am not at all sure if the two last 

 mentioned and longicorne are really good species ; they seem to differ 

 but little from each other ; and it is very desirable that some infor- 

 mation should be obtained regarding their earlier stages, so as to settle 

 the question whether they are distinct species or not. P. guttatum 

 is quite different from the other forms, and may be known from them 

 by its half-smoky wings. The only specimen that I have seen of it 

 was taken by Mr. J. E. Fletcher at Worcester. Selandria Klugi, 

 Ste., is clearly a Poecilosoma ; it perhaps = submuticum, Thoms. 



