398 BRITISH LEPIDOPTERA. 



between the pectinations of about 25 hairs, irregularly placed. The 

 face is covered with hairs, though the long wool that covers the 

 mouth-parts is largely that of the 1st coxae. The mouth-parts are 

 represented by a transverse oval depression, rising a little in the 

 centre. The femora and bases of the tibiae have very long hair-scales, 

 whilst the rest of the limbs carry hairs that are rather spines, or 

 bristles in appearance, but are really scales. These hairs are striated 

 and are very scale-like, except at ends of tarsal joints and along 

 anterior ridges of tibiae where they are more bristle-like. The 1st tibial 

 spur is very long, *88, its extremity bent outwards and extending 

 slightly beyond tibia ; there is no trace of spurs on other legs. The 

 tarsi measure 1st = 2- 0mm., 2nd = 2-0mm., 3rd = l-3mm. $ . The 

 female measures when at rest about 22mm. in length and about 6mm. 

 in width (at 7th abdominal). The head ventral, shiny, dirty-white 

 frontally, brownish at side, antennae dark-tipped, and rather conspicuous, 

 as also are the sunken eye-patches which are black. The rudimentary 

 mouth-parts are readily homologised, and the feet form a series of 

 well-developed mammillae, with terminal (? fleshy) hair-like prolonga- 

 tions, that are not used, however, for progression. The colour is 

 whitish, inclining to yellow on the dorsum, with corneous plates on 

 the thoracic and first two abdominal segments. The prothorax forms 

 a sort of hood over the head, brown in colour, shiny, corneous, with a 

 conspicuous spiracle, rather dark edged, the meso- and metathorax 

 also dark brown dorsally, and covered with thin corneous plates, 

 the venter of the thoracic segments tinged with pinkish. Ventrally in 

 the 1st and 2nd abdominal segments is a collection of tubules (urinary) 

 which are very conspicuous. A remarkable series of tracheal vessels 

 can be observed as a longitudinal band extending down each side of 

 the body (visible as a pale grey line to the naked eye), centralising 

 around the spiracles whence branches are given out, of which the two 

 most important go off at right angles to the main trunk, one centrally 

 up the dorsum of each segment, the other in the opposite direction, 

 ventrally. These, being nearer the surface than the conspicuous ventral 

 nerve ganglia, often shut off part of the latter. The nerve-cord is 

 traceable medio-ventrally from the 2nd thoracic to the 7th abdominal 

 segment, the conspicuous ganglia, in each segment, dark reddish-brown 

 marginally, paler centrally, each segmental mass evidently double, 

 as seen from the median line dividing it longitudinally ; that on the 

 7th abdominal is much elongated, and evidently forms the centre for 

 the nerves supplied to the segments posterior to it. The anal segment 

 carries a slender fleshy mass (? ovipositor) standing out behind in line 

 with the dorsum, whilst the preceding segment carries two fleshy flaps 

 (one on either side) the function of which is quite unknown. The 

 venter of these segments (9-10) tends to flesh colour. The spiracles 

 are small but distinct, surrounded by a flesh-coloured rim (of carti- 

 laginous appearance), and are slightly raised above the level of the 

 segments on which they are situated. When vermicular movement is 

 taking place there is a distinct swelling along the spiracular line, which 

 appears to be as much due to inflation by air as to muscular contrac- 

 tion. The abdominal segments 4-7 are the largest, the posterior seg- 

 ments thinning off very rapidly. [Described June 13th, 1899, from a 

 living J received from Mrs. Cowl.] The ? has brown dorsal plates 

 on the pro-, meso-, and metathorax, spreading quite down to the lateral 



