CEUTHOKHYNCHUS. 135 



on elytra, base of suture closely covered with white or 

 yellow scales. Thorax much narrowed in front, anterior 

 margin strongly raised, with central furrow and distinct 

 lateral tubercles ; elytra with fine, scarcely punctured striae, 

 interstices broad and flat, with raised granules behind. L. 

 l;j 1. Common. G. quadridens, Panz. 



-B 1, Elytra indistinctly variegated. 



Eather flat. Black ; tibiae and tarsi reddish ; under-side 

 closely, upper-side scantily covered with yellowish scales, 

 placed more thickly at sides of thorax and in places on 

 elytra, base of suture with white scales. Thorax with 

 distinct central furrow, transversely somewhat convex in 

 middle ; elytra with narrow punctured striae, distinctly 

 spined at sides and behind. L. 1^ 1. Not common. 



G. resedae, Marsh. 



b b. Upper-side evenly covered with brown, 

 or brown and gray scales or hairs. 



A a. Antennae black ; base of suture of 

 elytra with a white spot of scales. 



A 1. Tibiae black, 



a 1, Body scantily covered with brown 

 and gray scales. 



A 2, Thorax without lateral tubercle; 

 length 1-^ — \\ lines. 



Black, dull ; under-side, a spot at base of suture of elytra 

 and their side margin closely covered with white scales, 

 rest of upper-side scantily covered with brown and gray 

 ones. Thorax much broader than long, witli slight central 

 furrow, deeply constricted before apex, anterior margin 

 much raised ; elytra with narrow striae ; pygidium rounded, 

 entire. Moderately common. G. morginatus, Payk. 



2? 2. Thorax with a very small lateral 

 tubercle ; length 1 line. 



a 2, Pygidium entire. 



Similar to C. pundiger, but of shorter form, greater con- 

 vexity and with relatively wider striae. London. 



G. rotundatus, Bris. 



b 2. Pygidium excised at apex. 



Short ovate. Black ; under-side, a spot at base of suture 



