224 [October, 



foothold anywliere, E. sylvestrana is much less free in its use of silk, 

 and consequently far more helpless, being, in fact, quite so on a 

 smooth surface, such as glass or polished wood ; (5) in the latter 

 species the prothoracic plate is uniformly brownish-black, but in the 

 former it is brown margined with black. 



PUPA. 



The following description was made, on June 28th, from a pupa 

 found in a cluster of flowering male catkins of P. pinaster, in the Isle 

 of Purbeck, on June 25th, 1902. It had evidently only assumed this 

 state recently, and was quite identical with pupse from which imagines 

 of M. sylvestrana were bred in 1901. 



Length, 6 mm. Greatest breadth, 1'35 mm. 



Rather long and slender, gradually tapering posteriorly from the 3rd abdominal 

 segment. Shell smooth, with the head, thorax, and wing-eases polislied, but the 

 abdomen not so : there ai'e no noticeable hairs : dorsally, it is tawny-orange an- 

 teriorly, shading off to a rather paler, i. e., more orange, tint posteriorly, while 

 ventrally the head is tawny-orange with the wing- and appendage-cases ochreous- 

 orange, and the abdomen pale ochreous ; segmental divisions very clearly defined. 

 Eye-covers rather prominent, with the eyes showing through as rather large dark 

 brown spots. The head is armed in front with a conspicuous, short, and very strong, 

 beak-like cocoon-opener, with a sliarply pointed apex : this cocoon-opener is dark 

 brown in colour, and is supported posteriorly by a strong raised keel that runs back 

 from it over the crown of the head. Antennal cases extending to the middle, while 

 the wing- and hind-leg -cases reach to the end, of the 4th abdominal segment. A dark 

 ill-defined blotch, presumably representing the embryo testes, is seen through the 

 back of the 5th abdominal segment. All the abdominal segments, except the 1st, 

 have, across the back, two parallel rows of spikelets, sloping somewhat backward, 

 one near the anterior margin, the other a little behind the middle of the segment ; 

 the former is composed of longer and stouter spikelets, and is continued rather 

 further laterally, than the latter. The anal armature consists of a dorsal transverse 

 row of short, but very strong, dark brown spikelets, and also a ventral transverse 

 row in which the spikelets are much smaller ; round the anal segment is a circle of 

 orange-coloured hooked bristles. The free abdominal segments are Nos. 4, 5, 6, and 

 7, from which it is clear that the individual under notice is a male. 



The pupa o£ E. sylvestrana is separable at a glance from that of 

 O. hifasciana by the presence, in the former, of a conspicuous cocoon- 

 opener, while the latter has none. 



The pupa from which the above description was made, together 

 with two out of three others found in the same locality on June 

 28th, 1902, yielded three male imagines that emerged July 14th-15th, 

 1902. 



