232 MONOGRAPHIA 



SUB-GENUS IV. TRINOTON. (Nitzsch.) 



Trinotum, Burmeister. 

 SUB-GENERIC CHARACTER. 



Head nearly triangular, temporal magin deeply sinuated ; 

 eyes large and prominent, divided by a narrow ridge of 

 the orbital margin ; antenna nearly concealed in a cavity 

 of the temporal margin, the first joint large and cylin- 

 drical, second small, third transverse, fourth ovate, ter- 

 minated by a bristle ; prothorax obcordate ; mesothorax 

 large, transverse ; metathorax large, quadrate ; legs thick, 

 tibiae clavate, obliquely notched in front to receive the 

 tarsus, which is short and robust, and furnished with two 

 large involute pulvilli. 



1. TRINOTON CONSPURCATUM. (Louse of the Goose and 



Swan.) 



Plate XXI I. Fig.l. 



Elongate ; head transversely triangular, pitchy chestnut, 

 shining and pubescent, margin pale fulvous; abdomen 

 somewhat convex, abdominal bands nearly black on the 

 sides and bifurcate ; sutures pale ; femora with a black an- 

 nulus at the apex. 



Trinoton conspurcatum. Nitzsch. Germ. Mag. iii. p. 300. Steph. Cat. pt. 

 ii. p. 334. Trinotura conspurcatum. Burmeister Handbuch ii. pt. 

 ii. p. 440. Pediculus anseris. Sulzer Gesch. d. Ins. tab. 29. fig. 4. 



Head transversely triangular, temporal lobes much pro- 

 duced, yellowish-white, with a black uncinate mark from 



made his first excursion from Bencoolen into the interior of the island. In 

 that journey he was accompanied by a Naturalist of great zeal and acquire- 

 ments, the late Dr. Joseph Arnold, F.L.S. from whose researches in a field 

 so favourably situated, and so imperfectly traversed as Sumatra, the greatest 

 expectations had been formed. But these expectations were never to be 

 realized, for the same letter which gave us the first account of the gigantic 

 flower, brought also the intelligence of Dr. Arnold's death. See Linn. 

 Trans, vol. xiii. 



