282 On the so-called new Suhfamily Oeratocheilinas. 



land, collected by Dr. T. L. Bancroft, which were evidently 

 /. pallida, Griiuberg, while the single damaged specimen 

 of /S. d'uhjma, Grimshaw (^ Fauna Hawaiiensis/ iii. 1901, 

 p. 10), seemed to belong to the same species. I wrote to 

 Mr. Grimshaw suggesting the possibility, and he replied that 

 he had for long believed that it was so; he also very kindly 

 forwarded for my inspection a numher of specimens of 

 B. didyma received since the publication of his work. A 

 comparison of these with the Queensland specimen and with 

 the description of /. pallida removed all doubt as to their 

 identity. This is the only known recent species of the 

 genus (there are eight in the British ^luseum) iu which the 

 axillary vein is curved to the hind margin, not angulated. 

 Griiubcrg points out distinctions in the neurations of Idio- 

 phlebia and Styringomyia, but these can really only be 

 differences of interpretation, and not of structure. The 

 auxiliary vein, as noted by Grimshaw, is difficult to observe, 

 and this would be quite sufficient to account for Loew^s 

 statement that it is absent ; his specimens being enclosed 

 in amber would naturally be even more difficult to examine. 

 Loew's and Osten-Sacken's interpretation of the short veiu 

 connecting the first and third longitudinal veins as the 

 terminal portion of the second seems nearer the truth than 

 to call it, as Grlinbcrg does, the marginal cross-vein. The 

 first longitudinal vein can generally be distinguished along 

 nearly the whole length of the wing, though it lies iu close 

 conjunction with the costa. Griinberg's figure has probably 

 slightly exaggerated the distance between them. Idiophlebia 

 crassicosta, Speiser, is a Styritvjomyia, and is more typical 

 than /. pallida, as the auxiliary vein is less distinct and the 

 subcostal enters into conjunction with the costal nearer the 

 base of the wing. In this species, according to the author, 

 ''die gauze Flugelflaehe ist dicht behaart"; Dr. Speiser, 

 writing to me concerning this, says he may have meant that 

 the usual microscopic hairs on the membrane of the wing are 

 a little longer than in other Limuobiidie, but it is no hairi- 

 ness such as one sees, for example, in Psyc/ioda. The palpi 

 of /S. didyma, Grimshaw, are figured as being six-joiuted ; 

 this is, of course, a mistake, for which that author is not 

 himself responsible. 



I take this opportunity to describe a new species of the 

 genus Ceratocheilus. which is represented in the British 

 Museum by a single specimen (?) taken 12.1.1905 by 

 Lt.-Col. Giles at sea, 6° N., 20 miles from the West African 

 coast. 



