338 Entomological Society. 



verse and inclining downwards towards the head, the sides crenulate, 

 the posterior angles acute ; behind the transverse portion the thorax 

 becomes much narrower towards the metathorax, from which it is 

 separated by a deep transverse suture ; posterior angles of the meta- 

 thorax produced into an elongate stout acute spine ; the tibise and 

 tarsi ferruginous ; abdomen ovate, finely granulate, the nodes deeply 

 and coarsely sculptured ; the entire insect is sprinkled with erect 

 pubescence. 



Hab. Tropical Western Africa. 



Unique in the collection of J. O. Westwood, Esq., who kindly lent 

 it to me for description. 



3. Cataulacus parallelus, n. sp. 



Female. Length 3\ lines. Black, the head longitudinally rugose- 

 striate, the vertex emarginate, the emargination transversely rugose- 

 striate ; the scape of the antennae and extreme apex of the flagellum 

 ferruginous ; thorax longitudinally rugose-striate ; the metathorax 

 on each side produced iioto a stout sharp bent spine, beneath which 

 it is transversely sulcate ; wings tinged with yellow, their nervures 

 pale testaceous ; the tibiae and tarsi ferruginous ; the first node of 

 the abdomen coarsely sculptured transversely ; the second longitudi- 

 nally so ; abdomen oblong -quadrate, finely aciculate at the base, 

 beyond which it is delicately shagreened, and has towards the apex 

 a few short scattered pale setae. 



Hab. Cape of Good Hope. Apparently a rare species ; I have 

 only seen the specimen in my own collection. 



Onychognathus, n. g. 



Head heart-shaped ; eyes prominent, placed forwards on the sides 

 of the head ; mandibles elongate, projecting forwards in a line with 

 the body ; antennse elongate, inserted near the base of the mandibles, 

 5-jointed ; thorax narrow, a little longer than the head ; abdomen 

 attached to the thorax by two narrow elongate nodes, ovate. 



1 . Onychognathus antennatus. 



Neuter. Pale rufo-testaceous, the mandibles armed at their extre- 

 mity with two long spines or teeth, the upper one simple, the lower 

 one forked at the apex ; the anterior angles of the thorax have a 

 short acute spine, a second short one is situated about the middle at 

 the sides, and the metathorax is armed with two longer, slender, acute 

 spines ; legs elongate, very pale testaceous ; abdomen nearly rotun- 

 date, sUghtly flattened, the first node elongate clavate, the second 

 globose. 



Hah. New Zealand. In the collection of the British Museum. 



