412 TERTIARY INSECTS OP NORTH AMERICA. 



Anasa, to which the remaining species is referred. In all the antennae are 

 brief and have the joints beyond the basal of more than usual equality. 



Table of the genera of Coreina. 



Head not more thau half as long as the thorax 1. Anasa. 



Head more than half as long as the thorax. 



An oblique veiu ruuning from the upper apex of the central cell of the corinm to the costa, inclos- 

 ing a large rUomboidal cell at the apex of the corium. 



Head and thorax of subequal length '2. Achrestocoris. 



Head much shorter than the tborax 3. Phthinocoris. 



No oblique vein nor rhomboidal cell at apex of corium ^ 4. Fiezocoria. 



1. ANASA Amyot and Serville. 



This American genus, rich in species in tropical and subtropical regions 

 and with at least twenty species in North America having a great variety 

 of form and general appearance, is best known to the public by our com- 

 mon odoriferous " squash-bug." The genus has never before been found 

 fossil, but occurs in a single instance at Florissant, the species being some- 

 what peculiar in the form of the anterior half of the thorax. 



Anasa peiscoputida. 

 PI. 24, Fig. 4. 



Head rounded triangular, together with the eyes rather more than half 

 the width of the front lobe of the thorax, of about equal length and breadth, 

 the front strongly protruded in advance of the eyes. Antennae somewhat 

 more than half as long as the body, the first joint but little stouter than 

 the others, cylindrical, scarcely shorter than the head, the second and 

 fourth subequal, the third smaller. Thorax fully double the length of the 

 head, the anterior and posterior lobes very distinct in their form and struct- 

 ure, the posterior occupying two-thirds of the length with rounded alations, 

 which increase its breadth nearly one-third ; surface distantly and rather 

 finely granulate, except along its anterior edge, where the granulations are 

 larger and more crowded ; except for the alations the sides are straight ; 

 anterior lobe very rapidly tapering in front, the sides strongly oblique and 

 well rounded ; the front margin gently and broadly emarginate ; the surface 

 smooth like the head, except for a few granulations along the anterior mar- 

 gin and lateral edges. Scutellum large, triangular, granulate like the pos- 

 terior lobe of the thorax. Corium and clavus of the hemelytra distantly 



