ALLOCHROMA. 181 



appearance of a depression in the form of the letter T. Tlwrax 

 transverse, rectangular ; sides marginate, and parallel to each other, 

 or very slightly convergent towards the anterior angles ; surface 

 slightly complanato, with an obscure postmedial longitudinal ridge. 

 Scutellum triangular, fuscous. Elytra parallel, elongate, strongly 

 punctate-striate, of a bright metallic dark-green colour, the extreme 

 apex being somewhat tinged with fuscous, and sparingly clothed 

 with thin pubescence. Antennae, filiform, robust, dark rufo-fuscous ; 

 the basal joint black, broad, especially towards the apex, and de- 

 flected outwards ; the second joint short, ovate ; the third longer 

 than the fourth, and the fifth about the length of the first. Legs 

 bright crimson-red, with the anterior tarsi, tibise, and upper part of 

 the femora dark fuscous. 



Espiritu Santo, Brazil. A single specimen is in the collection of 

 the British Museum. 



Genus 32. ALLOCHROMA*. 



Palpi maxillares elongati, apicem versus subdilatati. 



Palpi labiales attenuati. 



Antenna fill formes, plerumque subtiliter incrassatce. 



Caput breve, Jiaud antice productum, sapenumero pcene verticale. 



Thorax transversus. 



Elytra lata, robusta, abbreviata, aliquando ante medium transverse 



depressa, glabra, rarius pube vestita. 

 Pedes : tibia? posticce a retro visa? longitudinaliter marginatce, siwuatce 



aut rectce, breves. 



Labrum transverse, short, subcircular ; mandibles concealed, armed 

 more or less distinctly at their inner surface with a double depression 

 forming together a short tooth. 



Maxillary palpi (Tab. YII. fig. 7 m) elongate, robust; the first 

 joint short, quadrate, constricted at the base ; the second longer and 

 broader, transversely truncate; the penultimate short, transverse, 

 robust, the breadth being greater than (or at least equal to) the 

 length, incrassated towards the apex ; the last joint conical and ab- 

 breviated. ^ 



Labial palpi (Tab. VII. fig. 7 n) attenuate and more or less elon- 

 gate ; the basal joint short ; the second and third of subequal length, 

 almost cylindrical, and attenuated towards the apex. 



Antennaz situated below (or in a line with) the lower margin of 

 the eyes, robust, filiform, with a distinct tendency in many species 



* aXXo?, clirersus ; xpCo^a, color. 



