History of a new for of larvse of Psychodidce. 481 
delicate, short hairs, between which a globule of air of 
considerable size is sometimes visible (fig. 10- The 
anal opening in this species lies on the ventral side a 
little before the openings of the air-tubes. The fig. 1 
shows on each side a pair of protruding trachael 
branchiae. Fig. 5 shows, on a larger scale, the trachael 
branchiaa of the larva of M. jnlosella^ six in number. 
The ventral side of the larvae of the three species is 
provided with eight suctorial discs, the last of which is 
placed on the penultimate segment (fig. 2). As to their 
structure I must refer to the figures (figs. 6 and 7), as it 
is from these only that I could describe them now. The 
figure of the rather flat, not, as in Curttpira, very- 
convex pupa (fig. 8), requires no further explanation ; I 
would only call attention to the wicker-basket-like 
covering of the claviform respiratory tubes (fig. 9). 
The fly strikes one at once by its singular appearance 
in repose. Examined from the ventral side, for instance, 
when resting on the side of the tumbler, the eyes seem 
to stare at one from the middle of the body, because the 
head is so much bent under the body, pointing back- 
wards ; from above the head cannot be seen at all. The 
wings, beset with long hair, look like two narrow stripes, 
directed backwards and a little outwards, and are raised 
considerably above the body; the peculiar twist they 
have is represented in fig. 1 3. 
The venation of the wings (fig. 12) resembles that of 
Psychoda ; they end in a point in Maruina pilosella 
(fig. 12 a) ; the end is more obtuse in M. spinosa 
(fig. 14) ; I am not quite sure, however, whether this 
character belongs to the species, or is merely sexual. 
The antennae are represented as 16-jointed in all my 
old drawings ; the third and the following joints show 
verticils of hairs near the base. The palpi are 4- 
jointed, the two last joints are beset with elongated 
scales, about 0,02-0,05 long. 
