Part V ] Breson : Larvae and Life Histories of Prionine Beetles . 
7 
MACROTOMA PLAGIATA, WATERHOUSE. 
Waterhouse, 1884, Arm. Mag. Nat. Hist. (5), NIY, p. 381. 
Distribution. 
Previously recorded from North India (Lameere, 1913, p. 28); present 
record from the Sunderbans forests, Bengal. 
Food plants. 
Heritiera Fomes i Buch. (Sundri). 
DESCRIPTION OF THE STAGES. 
I. The Adult. 
[See Plate I, Fig. 8.] 
General description. Dark brown, in parts almost black ; surface 
of the body dull owing to very fine granulation. 
Head with large prominent mandibles, much larger in d than in ? . 
Antennae not extending beyond the tip of the body, the 3rd joint in the 
d equal in length to the 4th, 5th, and 6th, united. Prothorax 
transverse with the front margin less broad than the hind margin, the 
sides armed with very short, sharp spines; the dorsal surface of the 
prothorax more shining than the rest of the body, irregularly roughened 
and pitted in the ? , and provided with two sub-triangular glossy patches 
separated from a transverse basal patch in the d . Elytra , dull granulate, 
parallel-sided, evenly rounded at the apex. 
Length. 28-45 mm. —1| ins. 
Technical description. Descriptions have been published by 
Lameere, 1903, and Gahan, 1906. 
2. The Larva. 
[See Plate I, Figs. 1—6.] 
General description. The figure on Plate I shows the general 
appearance of the larva sufficiently well; its colour is cream-white and 
its texture smooth, shining and almost bare of hairs. 
Technical description Described from 12 larvae ex Heritiera 
Fomes , Sunderbans, Bengal, 9—12-11—1915; 18-XI—1915; 12-IX— 
1918; C. F. C. B. coll., RRD.5, BCR. 2. 
HEAD (Fig. 4) with visible portion yellow; a spot on the epistomal 
margin at the apex of the median suture, a patch above the dorsal 
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