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486. 

 MACROCNEMA UNIMACULATA. 



Order Coleoptera. Fam. Chrysomelidae? — Galerucitac L,at. 

 Type of the Genus, Chrysomela Hyoscyami Linn. 



Macrocnema Meg. — Macronema Curt. — Altitarses III. — Altica 

 Panz., Geof., Lat. — Haltica Gyl. — Chrysomela Linn. 

 AntenncB inserted between and close to the margin of the eyes, 

 longer than the head and thorax, slightly clavate, pubescent, 

 pilose and 10-jointed, basal joint curved, longer and rather 

 stouter than the 2nd, 3rd a little the shortest, the remainder 

 increasing in diameter and shorter than the 4th, except the apical 

 joint, which is as long as thelst, ovate and truncated obliquely(6). 

 Labrum pocket-shaped, the sides towards the base dilated and 

 transparent, anterior margin notched and ciliated, with a little 

 protuberance in the centre and bristles across the middle (1). 

 Mandibles subtrigonate, curved outside, with 4 teeth at the apex, 

 the 2nd being the longest and largest, also a membranous and 

 ciliated margin on the inside (2). 



MaxillcB small and bilobed, internal lobe ovate, external narrow 

 curved and articulated, both ciliated. Palpi short, rather stout 

 and 4-jointed, basal joint small, the remainder bristly and of 

 equal size, obovate, the terminal joint subconic (3). 

 Mentum subquadrate, the sides rounded, the anterior margin 

 deeply concave. Lip attached by a broad membrane, the scapes 

 and a lobe between them homy, the anterior margin fleshy. 

 Paljn short triarticulate, basal joint cup-shaped, 2nd obovate, 

 3rd conical with a gland at the apex (4). 

 Head small subtrigonate, narrowed before the eyes, and subquadrate : 

 eyes orbicular and sublateral. Thorax trapezate : scuteUum minute. 

 JEiljxxa considerably broader than the thorax, ovate. Wings ample. 

 Thighs, posterior very large, somewhat ovate, grooved beneath to 

 receive the Tibiae, of which the posterior are rather short, compressed, 

 dilated and hooked at the apex, with one strong triangular, and several 

 small teeth ; the Tarsi in this pair are longer than the tibia and in- 

 serted on the inside of them some distance from the apex, 4-jointed 

 and ciliated beneath ; the basal joint is very long and clavate, 2nd 

 oblong, Srd bilobed, 4th slender and clavate (f), in the others the 

 basal joint is short, 2nd small and both obtrigonate (5). 



Unimaculata Curt. Guide, Gen. 428. 2*. 



Deep blue, sometimes elightly inclining to violet or green : 

 mouth and antennae pitchy, the 3 basal joints of the latter fer- 

 ruginous : head sparingly punctured : thorax very broad at the 

 base, minutely punctured, having also numerous large punctures 

 sparingly and irregularly distributed : elytra dilated before the 

 middle and rather narrowed behind, the external margin con- 

 cave at the middle, minutely punctured, with 11 punctured 

 striae on each, the sutural one short ; brassy black beneath and 

 thickly punctured : legs bright and deep ochreous, posterior 

 thighs brassy black, excepting the tips, which are feiTugiuous, 

 with a large round spot of the same colour on the inside at the 

 base, the other thighs more or less brassy black at the base. 

 In the Author's and other Cabinets. 



