40 Mr. G. K. Waterhouse on some Coleopterous Insects. 



impresso ; elytris punctatis, punctis subseriatim depositis. — Long. 



Corp. f lin. 



From Charles' Island. Procured by sweeping the herbage on 

 the high central parts of the island in the month of October. 



This little insect somewhat resembles the Haltica [Podagrica) 

 €Brata, but has the body rather more convex in the transverse di- 

 rection, the thorax broader, and the antennae shorter and stouter ; 

 when extended backwards they scarcely reach the middle of the 

 elytra. The thorax is transversely grooved behind, as in the ge- 

 nera Graptoderaj Crepidodera, &c. ; but it has not the small pos- 

 terior longitudinal indentations which we observe at the extre- 

 mities of the transverse groove in the latter genus, and in the 

 structure of the antennae and tarsi it differs from both. The tarsi 

 are formed as in Haltica rustica, auct. {Mantura of Stephens), 

 but the joints of the antennae are shorter ; the basal joint is lang 

 and stout ; the second and eight following joints scarcely differ in 

 length, but they very indistinctly increase in width towards the 

 apex of the antennae ; the second joint is nearly ovate ; the third, 

 fourth, fifth and sixth are of a very short obconic form, and the 

 rest nearly globose, with the exception of the last, which is longer 

 than the preceding, and acuminated at the apex : the tarsi are 

 short ; the first joint very large and broad ; the second rather less 

 than the third, and nearly triangular ; the third cordiform, and the 

 fourth scarcely equal in length to the preceding two joints taken 

 together. The eyes are lateral, moderately prominent. The thorax 

 is narrower than the elytra, broader than long, and very convex 

 in the transverse direction ; it is truncated behind, and slightly 

 rounded and produced over the head in front : the posterior 

 angles are very obtuse ; the surface impunctate : on the hinder 

 part is a very distinct transverse impression which does not ex- 

 tend quite to the sides. The elytra are of an oblong-ovate form, 

 and distinctly punctured above ; the punctures show a tendency 

 to arrange themselves in lines : each elytron is obtusely rounded 

 at the apex. The upper sm-face of the insect is glossy and of a 

 greenish brass colour : the legs and antennae are testaceous, but 

 the three or four terminal joints of the latter are somewhat 

 dusky. 



Of the various genera and subgenera of Halticidce which have 

 been characterized, I know none in which it can be placed ; its 

 nearest affinities appear to me to be with Mantura ; but the an- 

 tennae are less incrassated at the apex, and on the other hand, as 

 I have before stated, the basal joints are shorter and stouter : 

 it moreover has a transverse groove to the thorax not found in 

 that genus, and wants the longitudinal impressions on the hinder 

 part, which all the species of Mantura which have come under 

 my notice present. 



