URBICOLA COMMA. 181 



this is one's first and obvious conclusion, and it may be correct, but, 

 on carefully examining the prothoracic piece, a strip along its anterior 

 margin is marked off from the rest as by an obsolete suture ; such a 

 suture is unusual unless the part marked off be really the dorsal head- 

 piece. There is also attached to one antenna a small portion that may 

 be one-half the dorsal head-piece, or it may be a piece irregularly 

 fractured from the head-piece, but, looking at the condition of the 

 specimen, this is unlikely, especially as a similar amount is missing 

 from the other side, it is coloured like the head, it is about 1mm. long, 

 and 02mm. wide at the outer end, narrowing to a point at dorsal line. 

 The head has very numerous fine hairs, except on the glazed eye, 

 which is broad, glazed in the front and faceted below ; the vertex is 

 brown or blackish, with a large pale circle on each side ; the face pale, 

 the scape of antenna dark with a pale spot ; labrum triangular ; on each 

 side and below it, a large rounded lappet (? mandible) with concentric 

 ridges on its surface ; these do not meet, but leave a narrow angular 

 interval in which the labium appears ; below these are the very wide 

 maxillary bases, which immediately narrow and occupy middle line to 

 their free extremities. The first pair of legs extend half-way down 

 wings, very broad at tibial end ; the second legs, of more uniform 

 width, proceed from eye (shutting off first pair from antenna) , to within 

 2 , 0mm. of end of wings, each with a black dot on tip ; the antennae 

 with a marked and pointed club to somewhat further than front legs. 

 The prothorax with three rows of hairs, and dark coloration except 

 round hair-bases. The hairs on the head and thorax have their tips 

 slightly bent, but are otherwise quite like those on the rest of the 

 pupa. The spiracle-cover of the mesothorax (although the spiracle 

 belongs to the prothorax) is a large bun-like projection, 0*5mm. x 

 025mm., and covered with minute hairs closely set, like a dense 

 velvet pile. The mesothorax is long, and arches a long way back in 

 mediodorsal line ; the narrow metathorax is wide laterally and reaches 

 forwards into the space between mid-mesothorax and wings. The 

 mesothorax is marbled brown (? black) and terra-cotta, with many 

 hairs whose arrangement is not definitely in lines. The dorsal slit of 

 dehiscence does not quite reach the posterior border of the mesothorax. 

 The metathorax, narrow in the middle (0'6mm.), is wider laterally 

 (l-5mm.), and extends down into the hindwings without a suture, but 

 with a slightly impressed line of division ; the hindwings are narrow 

 slips touching, but deflected by, the spiracles of the 2nd and 3rd 

 abdominal segments, and ending before the posterior border of the 3rd 

 abdominal is reached ; they are slightly wrinkled but, like all the 

 appendages, without hairs ; the segment itself has a good many 

 of the short pale hairs like those of the other segments (0 1mm. to 

 f 15mm. long) ; they have small raised bases, sometimes colourless, some- 

 times dark, there are perhaps 30 to 36 on each side. Continuing the dorsal 

 view, the 1st abdominal segment is about 0*6mm. wide, and is faintly 

 divided into an anterior portion, comparatively smooth, and a posterior 

 with three transverse wrinkled ridges ; these equally carry a few 

 scattered hairs. The 2nd abdominal segment (l-3mm. broad) is not 

 very definitely subdivided, and has twenty or more irregular transverse 

 ridges ; the very numerous hairs also have a transverse arrangement, 

 one row near the hind-margin is fairly straight and continuous, but the 

 next rows are rather scraps and portions of transverse rows that only persist 



