BY W. MACLEAY, ESQ., F.L.S. 263 



499. — Metriorehynchus marginicollis. n. sp. 

 Length 4 lines. 

 Black. Antennae strongly dentate. Head transversely and 

 deeply impressed between the eyes. Thorax 7-hollowed, txnd 

 subtruncate at the base, with the lateral margins yellowish red. 

 Scutellum deeply emarginate at the apex. Elytra yellowish red 

 four-costate or counting the lateral border and the suture six- 

 costate, with the intei'vals rather confusedly punctate in double 

 rows, and towards the apex appearing to consist of single rows 

 of transverse punctures. Legs and under surface of body entirely 

 black. 



500. — Calochromus Guerinii. n. sp. 

 Length 4 lines. 



Bluish black, nitid. Thorax little broader than the head, 

 subtransverse, and quadrangular, with the angles rounded, the 

 median line deeply impressed and foveate near the base, and the 

 sides broadly bifoveate and of an orange colour. Scutellum sub- 

 truncate. Elytra orange red with the apex blue, and closely 

 subcostate, the alternate costae slightly larger than the others. 



I have named this species after the founder of the genus, who 

 nearly forty years ago formed it for the reception of an insect of 

 New Guinea. It is not by any means an uncommon Australian 

 form. 



501. LdCIOLA FLAVICOLLIS. n. sp. 



Length 3 lines. 

 Head nearly covered by the thorax, black, subopaque, sub- 

 depressed, and canaliculated in the middle, with the eyes in the 

 male very large. Thorax luteous yellow, transverse, subquadran- 

 gular, largely lobed in the middle at the apex, slightly so at the 

 base, and punctate, with the median line distinct, a transverse 

 depression near the apex and base, and a shallow elongated 

 fovea near the sides. Scutellum yellow, subtriangular, rounded 

 at the apex. Elytra broader than the thorax, punctate, and of a 

 dark brown colour, with the base, the suture as far as the middle, 

 and the sides almost to the apex, of a luteous yellow. Body 



