332 Prof. Westwood's notice oj a tube-making 



condition in the pupa state, in which, as will be 

 seen in figure, the only appearance of the large curved 

 dorsal horn is seen in a very small dorsal protuberance 

 in the middle of the hind part of the thorax. 



The perfect insect proves to be a species of Burmeister's 

 curious genus MacJuerota (Handb. d. Ent., 2 Bd. pp. 127, 

 128), intermediate between the Cercopides and the Centroti 

 and Menihracides. 



Of Burmeister's type of M. ensifera, brought by 

 Chammisso from the Island of Luzon, the chief of the 

 Philippines, I fortunately made a sketch in the Berlin 

 Museum more than fifty years ago, and was thereby 

 enabled to identify the species also brought from the 

 Philippine Islands by the late Mr. H. Cuming (Proc. 

 Zool. Soc, Nov. 14th", 1837, p. 130). 



The Ceylon insect agrees with the type in size and 

 general appearance, but the head is more pointed in 

 front and is concolorous, whereas it is black in M. ensi- 

 fera, which latter is destitute of the very minute dark 

 dots with which the Ceylon species is marked both on 

 the body and also on the fore wings. The specimens of 

 the latter (preserved, however, in spirits) are uniformly 

 pale luteous-coloured, whilst in the Philippine insect 

 the prothorax is marked with five slender brown longi- 

 tudinal vittse, and the sides of the middle segments of 

 the abdomen are black. 



The following specific characters will serve to dis- 

 tinguish the Ceylonese species : — 



Mach.erota guttigera. — Pallide luteo-fulva, guttis 

 minutis nigricantibus, vix distinctis, remote sparsis, 

 notata, praesertim in marginibus tegminum et in venis 

 insidentibus ; fronte capitis magis conico, concolori. 

 Long. Corp. circ. lin. 3. Expans. tegminum circ. lin. 6. 

 Habitat, Ceylon. Dom. S. Green detecta et mihi benevole 

 transmissa. 



Explanation of Plate VIII. 



Figs. 1, 2, 3. — The tube of the larva of Machcerota guttigera, 

 seen in different positions ; magnified. 

 ,, 4, 5. — Basal portion of the tube, showing the manner in 

 which it is made to clasp the twig on which it is affixed. 



