and Species of Gallcrucidae. 217 



obliquis notata, intermediis ad basin antennarum supra extensis. Cly- 

 peus et labrum lutea. Mandibulas nigras, nitidse. Caput infra, cum par- 

 tibus inferioribus oris, luteum. Antennae articulo basali luteo, apice 

 cum articidis 2 et 3 piceis, articulis 4-8 nigris, reliquis luteis. Pars 

 tota supera capitis, prothorax, scutellum et portio infera corporis cum 

 femoribus lutea, fulvo tincta. 



Note. — Mr. Westwood, being prevented by want of leisure from 

 studying the affinities of Chaloenus, has requested me to do so, 

 and assign the insect to its proper family in the great group of 

 Phytophagous insects. This (although feeling far less adequate to 

 the task than the author himself) I have endeavoured to do, placing 

 the genus amongst the Gallerucidce, as I consider that the structure 

 of the mouth and tarsi, together with the approximation of the an- 

 tennas at their base, point out that family as its true position. In 

 the form of the body it approaches somewhat to the Gallerucidce 

 amsopodce, the broad, flattened, and perpendicular head in particular 

 bearing a striking likeness to the same part in Loxoprosopus, a genus 

 of Halticidce ; but, on the other hand, the slender hinder thighs, not 

 fitted for leaping, and the extremely narrow and weak prosternum 

 place it without doubt in the Isopodous section of the family. I 

 think it ought to stand not far from Ccelomera, Erichs. In my 

 own cabinet I possess a second species of the genus, collected by 

 Mr. Wallace, which differs in many respects from Mr. Westwood's ; 

 of this I have ventured to give a description in the present note. — 

 Joseph S. Baly. 



Chalamus suturalis. (PI. XII. fig. 2.) 

 C. oralis, convexus, fusco-fulvus, nitidus, oculis antennisque nigris, barum 

 apice, tibiis tarsisque piceis ; tborace transverso ; elytris ovatis, reflexo- 

 marginatis, lsevibus, postice obsolete punctulatis, utroque infra basin 

 lineis quatuor punctorum impressormn instructo, nigro, vitta lata 

 suturali vix infra basin emarginata, postice angustata obscure fulva. 

 Long. 3j lin. 

 Hub. Amboyna. 



Head scarcely narrower than the thorax, face flattened, broad and 

 subquadrate, lower portion transversely concave, either side with an 

 impressed line, which commencing near the base of the jaw runs 

 obliquely upwards to join its fellow between the insertion of the 

 antennas, at its apex is a short ridge which extends upwards as far 

 as the upper edge of the eyes, above this again but continued in the 

 same line is a short groove ; antenna similar to those of L. latifrons, 

 with the exception of the four last joints, which are much shorter: 

 thorax twice as broad as long, sides narrowly margined, produced 

 and rounded in front, narrowed and sinuate near the base, all the 



