286 Transactions. — Zoology. 



near the middle of that line, the two anterior distant, the others placed a little further 

 back are only separated by the dorsal groove ; behind these there is a curved ridge ex- 

 tending between each antenna and the middle, but not attaining the medial furrow ; the 

 space behind is more or less rugose and sparsely hispid, with a few small punctures 

 behind each ridge. The mandibles are large and triangular ; the maxillary palpi are robust, 

 four-jointed, abruptly decreasing in bulk, so that the terminal joint becomes quite minute; 

 the labial palpi are tri-articulate, smaller than, but similar in form to the maxillary, but 

 with their apical joint rather less abbreviated ; the antennte are very small, not even as 

 long as the labial palpi, with four joints, of which the last is almost aciculate, and their 

 joints are evidently capable of retraction one within the other. The second segment is 

 larger than the following two united, having near each side a large, shghtly-raised, tri- 

 angular space terminating in a carina, which extends forwards beyond the middle ; the 

 disc is rather coarsely rugose, but the sculpture becomes much finer towards the front, 

 where there are some deep wrinkles. On each of the succeeding segments, though less 

 evident on the third and last, theye is a large transverse space, slightly elevated, but 

 flattened above, which is distinctly wrinkled ; the surface of these segments (3 - 13) is 

 covered with minute, spine-like elevations, whilst the extremity of the last three is more 

 or less coarsely rugose. The sculpture of the under side of the segments corresponds, 

 more or less, with that of the upper. The sphacles are transversely oval, nine in number 

 on each side, the first, situated on the tliird segment, is twios as large as any of the others, 

 which are located on the fifth, sixth, seventh, eighth, ninth, tenth, eleventh, and twelfth 

 segments. The legs, attached to the second, third, and fourth segments, are very short, 

 four-jointed, and very similar in structure to the palpi, but having the last articulation 

 more slender and slightly curved. 



The larvffi, wlien immersed in alcohol, become discoloured, so that after 

 the lapse of a few months they become of a pale brown ; the size varies, the 

 measurements given above are applicable to full grown examples only. 



The pupa resembles the larva in colour, is about 21 lines in length by 7 or 8 in 

 breadth in its widest parts, and consists of twelve dorsal segments, the thirteenth being 

 retracted to form the generative organs, whilst the first is represented by the head ; it is 

 subject to the modifications observable in the larva when preserved in sphits. The eyes 

 are sometimes discernible, but are covered by a film ; the elytra, proceeding from the 

 third segment, are obliquely folded below the body, and, to a great extent, cover the 

 under-wings, wliich issue from the fourth segment ; the antennae form a curve, and repose 

 on the elytra ; the four front legs are folded above these, the posterior pair below the 

 wings. 



The second dorsal segment is somewhat similar in outline to the prothorax of the 

 perfect insect, rather uneven, and more or less transversely rugose. The third is about 

 half the length of the contiguous ones, terminates behind in a large, obtuse tubercle, and 

 is also wrinkled. The fourth bears a tubercle near each side, and a median longitudinal 

 row of small tubercular elevations, which, however, become obsolete posteriorly ; its 

 surface is a little glossy and exhibits many minute, spine-like tubercles, not, however, so 

 closely congregated as on the remaining segments. The seventh, eighth, ninth, and 

 tenth, bear an obvious discoidal elevation, composed of two almost contiguous tubercles ; 

 whilst the last, which might be termed the thirteenth, terminates in two fleshy protu- 

 berances. 



The mformation respecting the habits of this insect may be communi- 

 cated in this way. We will suppose the female to have selected an old 



