species of Heteromerous Coleoptera, 321 



Genus Megalophrys*. 



Head large, but little narrower than the thorax, strongly trilobed 

 in front, the mesial lobe the largest, nearly semicircular, but 

 having an indistinct angle in the middle : the lateral lobes very 

 prominent, recurved and descending posteriorly, so as partially 

 to inclose the base of the antenna, and indistinctly encroaching 

 upon the fore part of the eye, above vi^hich is a longitudinal 

 ridge. The eye lateral, tolerably prominent, with the vertical 

 diameter the greatest, slightly emarginated in front. 



Labrum small, obtusely pointed in front j hidden when the jaws 

 are closed. 



Mandibles short and stout, very broad at the apex, which is 

 strongly notched, and thus divided into two lobes, of which the 

 lower one is the largest and longest and truncated at the extre- 

 mity, and the upper one is pointed. 



Maxillary palpi moderately long ; the terminal joint securiform, 

 and obliquely truncated at the apex. 



Mentum broad, hiding the maxillse, truncated in front : it may be 

 described as hexagonal, with the hinder margin by far the 

 longest, and the remaining sides nearly equal to each other. 



Antenna moderately long and slender; the joints, most of them, 

 of a longish obconic form ; the second joint nearly equal in 

 length to the fourth or fifth, the third about half as long again 

 as the fourth : from the fourth to the tenth the joints become 

 gradually and successively shorter ; the penultimate joint pre- 

 sents a nearly triangular outline, and the last is of a short 

 ovate form, and smaller than the preceding; the terminal joints 

 are of equal width, or very nearly so, to the other joints. 



Thorax rather narrow, but little convex above, the width in front 

 exceeding the length ; contracted behind and with the angles 

 acute : its posterior margin is bisinuated, and applied to the 

 base of the thorax : a delicately impressed line is observed close 

 to the lateral and posterior margins, which are acute. 



Scutellum small, and rounded behind. 



Elytra soldered together at the suture, distinctly broader than 

 the thorax, convex, and of an oblong-ovate form, sinuated at 

 the base so as to present an outline corresponding to the 

 hinder margin of the thorax ; the humeral angles obtuse, and 

 the apex somewhat pointed : they are simply rounded at the 

 sides, the lateral keel being only represented by a line situated 

 close to the lateral margin, and which can scarcely be said to 

 be raised excepting at, and near the humeral angle. 



Legs moderately long and slender, the tibise cyhndrical or nearly 



* This name is suggested by the great projection of the lobes of the head, 

 which are situated in front of the eye. 



Ann, ^ Mag, N, Hist. Vol, xvi. 2 A 



