Mr. R. C. L. Perkins on Hawaiian Ophioninae. 531 



Athyreodon belongs to the former division, but on exam- 

 ining a dozen Hawaiian specimens I find that in four this 

 nervure is angulated at the middle, in four a little above the 

 middle and in one only greatly above the middle, as he has 

 figured it. 



In the other division in Pycnophion the transverse median 

 nervure is said to be " angularly broken at or near the 

 middle but is figured as angulated far below the middle ; 

 Banchogastra as broken " much below the middle " but 

 it is figured as being angulated much nearer the middle 

 than in Pycnophion and the angle is not '' a right angle." 

 Of the specimens of Banchogastra that I have examined, 

 the transverse median is angulated in one example at 

 about the middle, in the others well below this, but always 

 before the lower third of its length. 



Pycnophion is said to have the ovipositor as long as the 

 body and the propodeum with a transverse carina, but one 

 of the species is described as without a carina, and with a 

 much shorter ovipositor. Similarly Erefnotylus is placed 

 under the genera with " one or two transverse carinae " 

 on the propodeum, while his Hawaiian species has 

 none. 



His use of very slight differences in the position of the 

 extremity of the first recurrent nervure with regard to the 

 '' discoidal " nervure for defining the genera is worthless. 

 It is not often a constant character in the genera under 

 consideration nor even a reliable specific character in some 

 species. 



In the mass of Hawaiian material that I have examined 

 in Pleuroneurophion, Enicospilus and Eremotylus the trans- 

 verse median nervure is always angulated lower down than 

 in any of the other genera, and to this extent the point 

 of angulation is useful, especially as the genera named, 

 excepting one remarkable species of Enicospilus, all have 

 a glabrous area beneath the basal part of the generally 

 thickened radius, which area is wanting in the others. 



Whether the Hawaiian Athyreodon is congeneric with 

 the type species (which had only a MS. specific name) 

 must remain doubtful, until more important characters 

 than those given by Ashmead have been examined. Pleuro- 

 neurophion is clearly related to some of the Hawaiian 

 Enicospilus and not to Ophion. Morley in his table of 

 Ophionines places Ophion and Enicospilus next to one 

 another as having the " nervellus intercepted below centre," 



TRANS. ENT. SOC. LOND. 1914. — PARTS III, IV. (FEB.) M M 



