Vol. xxii] ENTOMOLOGICAL NEWS. 367 



Falls in with the group of allied species containing conso- 

 brinns Girault, aspidioti Girault, hoivardii Ashmead, striaticorne 

 Girault and enchariforine Haliday, and most closely allied with 

 consobrinus and striaticorne; it resembles both casually. How- 

 ever, it differs from consobrinus in having the discal ciliation 

 of the fore wing finer and more uniform, the wing somewhat 

 wider (about 16 longitudinal lines of discal cilia across the wid- 

 est part), its marginal cilia distinctly shorter (the longest about 

 two-thirds the greatest wing width), especially noticeable 

 along the cephalic margin of the blade ; the marginal cilia of 

 the posterior wings are likewise shorter, about a half shorter ; 

 the proximal tarsal joints are much longer and slender, those 

 of the cephalic tarsi for example, being at least a third longer. 

 The two species otherwise alike as far as could be seen. 



From striaticorne Girault, the species differs about as much 

 as it does from consobrinus, in having the marginal cilia of the 

 fore and posterior wings shorter but the fore wing is some- 

 what narrower than in striaticorne; the legs are formed very 

 much as in the latter but the intermediate and caudal femora 

 are distinctly shorter; the joints of the flagellum are uniform- 

 ly shorter than those of striaticorne, about a fourth or more 

 shorter. Thus, brittanum is more nearly like the last named 

 species, especially in tarsal segments, color and discal ciliation 

 of the fore wings. 



From the species hozvardii Ashmead it may be distinguished 

 much as striaticorne may be, namely by lacking the peculiar ar- 

 rangement of the marginal cilia of the fore wing; also brit- 

 tanum has finer discal ciliation in the fore wing which is also 

 narrower and bears (as does also the caudal wing) much 

 shorter marginal cilia. The caudal wing in brittanum is fu- 

 mated distad as it is slightly with howardii. 



From the species aspidioti Girault, brittanum differs again 

 in lacking the peculiar arrangement of the marginal cilia of 

 the fore wings and in bearing distinctly shorter marginal cilia 

 on that wing ; again, in having the wing differently shaped ; 

 around the apex of the fore wing in aspidioti the marginal ciliri 

 shorten just at the apex ; in brittanum no shortening occurs but 

 a gradual lengthening from the cephalic wing margin ; brit- 

 tanum differs from aspidioti in the color of the legs, all tarsi 



