92 LARRIDA. 
strong tooth on the exterior towards the base. Tuorax 
oval; the collar considerably lower than the mesothorax; the 
scutellum transverse; the metathoraxr truncate posteriorly, 
broader than long; the superior mings nith one marginal cell, 
ovate, and two submarginal cells—the first receiving the first 
recurrent nervure near that which separates it from the second 
’ submarginal cell, which is triangular and petiolated, and re- 
ceiving the second recurrent nervure near its apex ; legs mo- 
_ derate, subspinose, the tarsi long, the anterior ones ciliated 
on the outside. The aspomEN subovate, subsessile, the apex 
pointed, the posterior margin of the segments very slightly 
. depressed. . 
Type, M. bicolor. 
~ +44 This genus was first established by Jurine in 1807. 
It has been adopted by all subsequent authors, and ap- 
pears to be derived from pirnos, a petiole or stalk, from 
the petiole of its second submarginal cell. 
Spe. 1. sicotor. Jurine. 
- miger, abdominis basi rufo. 
, length 3 lines. 
Jurine, 206. Pl. 11. G. 25; Latr. Nouv, Dict. 21. 212 ; Guerin, Dict. 
Classique H. N. 10.632; V. d. Lind. Obs. pt. 2. 25. 
Larva dubia. Panz. 106. 14. 
Black, delicately punctured : head having the antenne black ; 
mandibles rufous, a little darker at the apex; each of the stem- 
mata placed in a foveolet. 
Thorax punctured; the metathorax having on its superior 
surface a central longitudinal carina, with three or four diverg- 
ing on each side obliquely from its base, occupying together a 
subcordiform space, the apex of which terminates at the verge 
of the truncation, which is transversely striate, and has a deep 
longitudinal fossulet in its centre; the tegule piceous; the 
wings slightly coloured, deeper towards the margin; legs black, 
