GALERUCID^. AUCHENIA. 285 



Pedes postici saltatorii ; femoribus incrassatis. 

 Tibiis posticis baud externe dentatis aut spinosis. 

 Tarsi postici breves, in apice tibiae inserti : 

 Corpus oblongo-ovatum. 



T/ioraa? coleoptrorum angustior : • 396. Haltica. 



latitude. . . 399. Mantura. 

 hemisphcericum. 

 Antennce articulis simplicibus : . . 402. Sph^roderma. 



inffiqualibus: . . 403. Mniophila. 



Tarsi postici elongati, in apice tibise inserti : . 397- Thy amis. 



ab apice tibias remoti : . 398. Macrocnema. 



Tibiis posticis externe dentatis, aut spinosis. 



dentatis, caput prominulum : . . 401. Odontocnema. 



spinosis, caput intra thoracem retractum : 400. Dibolia. 



Genus CCCXCL— Auchenia, Marsltam. 



Antennae in both sexes shorter than the body, longest in the male, filiform, the 

 basal joint slightly robust, the second about half the length of the third, 

 which is elongate subcylindric, the remainder similar, and of nearly equal 

 length. Palpi short, the terminal joint subconic: head short, broad: eyes 

 large, prominent: thorax transverse, with the hinder angles obtuse: scutellum 

 large : elytra considerably broader at the base than the thorax, the apex ob- 

 tusely rounded with an angle within: body oblong: legs moderate: femora 

 alike, posterior not incrassated : tibia simple : tarsi short. 



If the structure of the antennse is to be our guide in the forma- 

 tion of genera, as stated by Mr. Curtis, in his remarks on the 

 genus Myeetophagus, the present genus from that point alone 

 ought to be divided from Adimonia, as may be seen by a com- 

 parison of the descriptions, exclusively of the form of thorax, elytra, 

 &c. :— the last being rounded at the apex, and having an angle 

 within on the sutural margin; the only indigenous species more- 

 over aifects marshy districts. 



Sp. 1. quadrimaculate. Plate xxii./ 5. ^.—Glabra-nigra, ore, antennis pe- 

 dibus thoraceque Jlavo-testaceis, elytris subtilissime punctulatis Jlavis, maculis 

 duabus nigris remotissimis. (Long. corp. 3 — 4^ lin.) 



Ch. 4-maculata. Linne. — Au. 4-maculata. Steph. Catal. 211. No. 2132. — 

 Adi. 4-maculata. — Curtis, viii. pi. 366. $ var. 



Oblong, glabrous : head anteriorly yellow, posteriorly black : thorax testaceous- 

 yellow, shining, with a fovea on the back in front, and another larger one 

 behind : elytra very finely punctured, slightly glossy, testaceous-yellow, each 

 with two black spots, one placed towards the suture at the base and rounded, 

 the other larger, transverse, and situated near the apex: legs and antennae 

 also pale testaceous. 



The spots on the elytra vary considerably in size, and the apical one is some- 

 times divided. 



