MIMAS TILLE. 413 



5th abdominal more rapidly at each segment ; but the ioth 

 abdominal still possesses a diameter of 3-5111111., with a strong 

 spike at its dorsal margin so as to preserve the appearance of 

 straightness to the whole pupa, although the abdominal segments 

 are really slightly curved forwards. The general characters are 

 ordinary Amorphid, i.e., obtect, the 5th and 6th abdominal only 

 movable, face as in most obtect pupae, labrum ventral, eyes with 

 convexity pointing ventrally, etc. From labrum to end of wings 

 is 15mm., for the last .4mm. of this the wings meet closely in the 

 middle line, quite close to their apices and without showing 3rd tarsi, 

 they reach to quite posterior border of 4th abdominal segment. 

 The proboscis reaches to the point where the wings meet, the 

 2nd pair of legs is just outside the proboscis and all but reach 

 this point ; the antennae are again outside the legs and fractionally 

 shorter ; the 1st legs between maxilla and 2nd legs are 3mm. 

 short of reaching this point ; the maxillae are basally broad as 

 is very usual ; the 1st legs have a base against the eyes and an 

 equally long margin against the antenna. The general surface is 

 rough and dull, but all these appendages — maxillae, legs, antennae — 

 are separated from each other by a line of smooth shining surface, 

 as if a fractional margin of what ought to have been opposed 

 surfaces were exposed ; this glazed surface is slightly wider at 

 a point between maxilla and 1st leg, where, in some pupae, a portion 

 of first femur is exposed. There is no trace of labium ; the bases 

 of maxillae narrow forwards to an angle in the middle line, 

 terminated by a small button which appears to be labrum ; mandibles 

 not expressed. The other features of the pupa fall rather under 

 the head of surface-sculpturing, since it is not easy to describe 

 them altogether apart from what is really a separate matter, the 

 development of the wrinkles, etc., of the chitinous surface. 

 The pupa has the whole surface of the abdominal segments at least 

 (except the intersegmental subsegment) covered with scattered minute 

 hairs or bristles of a length of o'o6 mm., usually on the summits of the 

 wrinkles ; the general surface is rough, taking, on the wings, the form of 

 a series of fine blunt points, arranged, not very clearly, in transverse 

 rows or ridges, broken by a longitudinal arrangement related probably 

 to the nervures, which are not otherwise so clearly expressed ; the 

 middle of the hind margin of wing on 4th segment is, not very deeply, 

 sinuate about its middle ; Poulton's line is clearly marked, by the 

 rows of rough points being, on it, in very definitely longitudinal 

 regular rows; behind the forewing, a narrow strip of hind wing 

 extends to middle of 3rd abdominal segment, and is divided longitud- 

 inally into two nearly equal strips by a clearly-marked Poulton's 

 line; at the base of the wing, about half-way between 1st spiracle 

 and base of hind wing, is a rather stronger group of rough points, and on 

 some specimens, two or three of these combine to make a definite, 

 but rudimentary, spine or horn. The other appendages have fine 

 rough points indefinitely arranged, except on antennae, where they 

 are in fine transverse lines, with a more marked series along each 

 margin. The glazed eye is a definite smooth line, with convexity 

 directed ventrally, and has the surface-points fading into it in 

 radiating grooves. The inter-antennal portions of the head and 

 of the clypeus in front of these tend to form slight elevations 

 covered with the usual rough points. The prothorax faces half- 



