86 Mr. F. P. Pascoe on the Colydiidee 
thorax ; antennze ferruginous, as long as the head, covered at their 
insertion, the two basal joints short, thick, the last three forming a 
loose, elongate club; palpi short, stout, the maxillary gradually thicken- 
ing upwards, the terminal joint obliquely truncate, the labial much 
smaller, obtuse ; mentum (?) broadly transverse, contracted posteriorly ; 
labium small, fringed with long hairs; maxillary lobes short, with a 
narrow border of cilia; mandibles entire at the apex, with three teeth 
internally, which gradually diminish in size; prothorax quadrate, 
sparingly punctured ; scutellum large, transverse; elytra not broader 
than the prothorax, seriate-punctate, the anterior third reddish yellow, 
a large spot of the same colour at the apex of each elytron externally ; 
body beneath reddish yellow; legs ferruginous; tibize subtrigonate, 
rather slender, slightly spurred; tarsi slender, the three basal joints, 
however, shorter than the last. Length 1 line. 
I am in some doubt as to the form of the labium ; it appears to be 
as it is shown in the figure ; but the fringe of cilia has a bilobed out- 
line: the mentum has more the form of the jugular plate. 
Aulonium angustatum. (Pl. V. fig. 15.) 
A, cylindricum, ferrugineum; fronte bituberculata; prothorace quadri- 
sulcato, medio antice excavato. 
Hab. San Paulo. 
Narrowly cylindrical, ferruginous, very minutely punctured; head 
rather narrow, with two oblong approximate tubercles in front; pro- 
thorax not broader than the head, the sides parallel, with four longi- 
tudinal impressed lines, the two central uniting anteriorly and termi- 
nating in a broad and deep excavation ; scutellum transverse; elytra 
very smooth, parallel, not broader than the prothorax ; body beneath 
ferruginous ; legs nearly testaceous. Length 1} line. 
Easily recognized on account of its narrow cylindrical form. In 
the rest of the species of this genus collected by Mr. Bates, the body 
is oblong or oblong-ovate, rather depressed, without any tubercles 
on the head. The lateral margin is deeply grooved throughout, so 
as to present, when viewed sideways, a double line, or two margins ; 
and each of the elytra has eight lines of punctures, without in- 
cluding a shorter one (often very imperfectly developed) by the side 
of the scutellum. A. prepositum, A. egens, and A. subleve closely re- 
semble each other in general appearance, and are allied to the species 
known as A. bidentatum, Fab., but may readily be distinguished by 
the characters given below. A. ignotum and A. hebes are very dis- 
tinct species. A. oblitum approaches the smaller individuals of A. 
subleve ; but the more quadrate prothorax, scarcely narrowed in front, 
will, ¢nter alia, distinguish it. 
