276 Mr. R. M‘Lachlan’s Descriptions of 
Macronema percitans is a good species of that genus, with 
possibly two very minute anterior spurs in the male. 
Genus Musarna. This genus belongs to the Sericostomide and 
not to the Leptoceride. It is in part identical with Barypenthus, 
Burmeister, as has already been noticed by Hagen in his ‘ Sy- 
nopsis Synonymica.” The single type of each of the three 
species is a male and not a female as described; by some error 
the words ‘ Mas et Feem.” and * Male and Female” are inserted at 
the head of the generic diagnosis and description. The three 
species are large and conspicuous insects, remarkable for their 
very broad wings, those of A/. claudens being shorter than in the 
others; they bear considerable resemblance to each other, but 
according to recognized rules they must be placed in two genera. 
In all three the maxillary palpi of the males are ascending, the 
joints of nearly equal thickness and sparsely hairy; but in MM. 
aperiens (Pl. XVIII. fig. 3) and M. interclusa, these palpi are four- 
jointed, whereas in M. claudens (Pl. XVIII. fig. 2) they are only 
three-jointed ; the terminal joint in the first two species is small. 
The neuration of the wings is arranged in much the same manner 
in all three, but again there is a striking difference, for in M. 
aperiens and M., interclusa there is one more apical cell in both 
pairs of wings than in M. claudens, the lower branch of the 
ramus thyrifer in the anterior wings being bifurcate in the two 
former and simply furcate in the latter, with a corresponding 
difference in the forks of the posterior wings.* 
M. claudens (P]). XVII. fig. 2) is identical with Barypenthus 
rufipes, of Burmeister (Handb. Ent. ti. p. 929, 2); the diagnosis 
of the latter is short and unsatisfactory, but the figure by Kolenati 
(Gen. et Spee. Trichop. pt. 2, tab. iv. fig. 48) leaves no doubt on 
the subject. It seems probable, however, that Burmeister, and it 
is certain that Kolenati, included one of the other species of 
Musarna of Walker under the generic term Barypenthus, for I 
think that B. concolor of Burmeister is identical with AJ. aperzens 
of Walker; and Kolenati, in his description of the genus Bary- 
penthus, says that the maxillary palpi are four-jointed, although 
Burmeister in his generic description states that the maxillary 
palpi of the males are distinctly tiree-jointed ; this agrees with B. 
‘rufipes, which must therefore be considered as the type of the genus, 
* Inthe type of M. aperiens the sixth apical cell in the right anterior wing 
is divided by a transverse vein, placed not far from the base of the cell; this 
is wanting in the left wing, and is simply an aberrant variation, This vein 
is indicated by a dotted line in Plate XVIII. fig. 3. 
