228 Transactions, — Zoology. 



Art. XXVII. — Descriptions of the Larva and Pupa of Lasiorhynclius 

 barbicornis. By Capt. T. Broun. 



{Read before the Auckland Institute, list June, 1880.] 

 Larva. 

 Colotir : testaceous, more or less infuscate, bead constantly castaneous, witb 

 piceous mandibles. Its form somewbat cylindrical, ordinarily compressed 

 laterally, distended in front and bebind. Composed of tbirteen segments, 

 tbe first forming tbe bead, tbe penultimate and terminal witb distinct dorsal 

 sutures, but interrupted laterally and nearly obliterated below ; all tbe seg- 

 ments witb deep transverse furrows, tbeir sides (except tbe anterior four 

 and anal one) limited by a deep irregular groove, so tbat tbe ratber flat 

 inferior surface is very obviously separated from tbe sides. Head : mucb 

 narrower tban tbe second segment, sub-conical, rugulose in front, almost 

 smootb bebind, bearing several elongate fulvous bristles ; epistome well 

 marked, strongly transversal, its basal suture curved ; lahrmn broader tban 

 long ; mandibles robust, sligbtly notcbed at apex, uneven ; eyes represented 

 by small rounded elevations situated some little distance from tbe base of 

 tbe jaws ; maxillary palpi greatly developed, as long as tbe lower surface of 

 the head, second articulation excessively short ; third small, aciculate ; tbe 

 labial very small, connate, appearing to form the apical portion of the 

 mentum ; second joint small, cylindric, terminal needle-shaped ; devoid of 

 antenna. The second segment broad, very finely rugose, with a large spira- 

 cle at each side, and a dorsal fold at its base ; third broader than the pre- 

 ceding, broadly emarginate in front, with a large semicircular basal lobe, 

 and a small chestnut-coloured elevation near each side ; fourth equalling 

 tbe former in width, obtusely rounded apically, its anterior portion sepa- 

 rated from the basal by a deep transverse furrow ; fifth to tenth with two 

 dorsal grooves, the last-mentioned feebly impressed. Tbe legs proceed from 

 the second, third and fourth segments, are very short, and apparently only 

 bi-articulate ; they are setose. Tbe spiracles, sixteen in number, are placed 

 at tbe sides of the superior surface, on tbe second, fifth, sixth, seventh, 

 eighth, ninth, tenth and eleventh segments. The whole surface is almost 

 destitute of clothing, there being only a few scattered hair-like bristles, 

 those on the underside shortest. The size is subject to considerable varia- 

 tion; the example before me, a small one, measures nine lines in length with 

 both extremities incurved, aud three in breadth, the middle parts, however, 

 being much narrower. 



Pupa. 

 Male measm-es nineteen lines in length, but with the rostrum projecting 

 four lines beyond tbe last ventral segment. The head and rostrum attain a 



