ALYDID.E. 143 



not produced ; Ihce curved in a line with the crown, long, deflected, 

 triangular, with the sides rounded ; central lobe narrow, the apex 

 curved under. AritenncB long, slender, of nearly equal thickness 

 throughout; 1st joint as long as the crown of the head; 2nd and 3rd 

 a trifle longer, subequal ; 4th as long as the 2ud and 3rd together, 

 curved. Eijes large, globose, prominent, placed in the middle of the 

 sides of the head. Ocelli large, prominent, approximate, situate in a 

 line with the back of the eyes. Mostrum reaching the 2nd pair of 

 cox(B, strong, 2nd joint longest. 



Thorax stout ; Pronotum deflected, trapeziform, hinder angles 

 rounded, with a depression within them running out on the posterior 

 margin. Scutellum long, narrow, pointed. Elytra as long or nearly 

 as long as the abdomen ; Gorium long, narrow, pointed ; anterior 

 margin straight ; posterior margin very oblique ; nerves fine ; Mem- 

 brane wide, elliptic, filled with long nerves springing from a nerve 

 which lies close to and parallel with the base except at the inner 

 angle, where are two large angulated cells. Sternum strong, broad, 

 with a shallow central channel. Legs strong ; coxce large ; hinder 

 tliiglis gradually a little incrassated with several strong spines 

 beneath. 



Abdomen narrow at the base ; above flat ; the last segment in ^ 

 wide, posterior margin broadly rounded ; in $ , slightly cut out in 

 the centre ; Connexivum ^vide, vertical. Underside convex, the 3rd 

 segment very long ; the last segment posteriorly, in ,^ broadly and 

 squarely, in ? less, and roundly, cut out. Genital segments, above, 

 in $, only appear as 3 keels projecting hindwardly ; in ? but one 

 segment is visible, short, the sides narrowed, and the posterior mar- 

 gin truncate ; beneath, in ^ , one segment is visible, short, convex, 

 ending in 3 short and spinous processes ; in ? also only one seg- 

 ment is usually seen, short, convex, and obtusely pointed ; but 

 sometimes the ends of the other 2 segments are visible. 



Species 1. — Alydus calcauatus. 



CiMEX CALCARATUs, Lui. F. S. 96S, (1761); S. N. i, 733, 111 (17G7) ; 

 De G. Mem. ill, 280, 21, pi. 11, figs. 23 & 21 

 (1773); Rossi, 1. E. ii, 213, 1327 (1790). 



LxGJEvs CALCAUATvs, Fad. E. S. iv, 162, 91 (1791); JFolf, Ic. Cim. 

 Ill, t. 11, fig. 138 (1801). 



