270 TERTIARY INSECTS OF NORTH AMERICA. 



angle of forty-five degrees with the same ; the discoidal cell about four 

 times as broad on the hind margin as at the base. The cubital vein forks 

 about at its middle and then rather widely. 



Length of body, 1.8"""; of fore wing, 4 mm . 



Florissant. One specimen, No. 315. 



13. AMALANCON gen. nov. (ajuaAo?, drnabv}. 



Head considerably narrower than the thorax, quadrate, with the front 

 triangularly and roundly produced to a considerable degree ; no frontal 

 tubercles. Antenna' about two-thirds as long as the body, tapering, the 

 third joint relatively stout, about as long and at base fully as stout as the 

 fore tibia-, the first and second joints not one- half broader. Rostrum as long- 

 as the thorax, very slender. Fore wings very narrow, with the stigmatic 

 vein arising very far back in the long stigma, so that the stigmatic cell is 

 nearly half as long as the wing. Cubital vein once forked, far beyond the 

 base of the stigmatic vein, and a long way from its own origin, which is at 

 some distance before the middle of the space between the first oblique and 

 the stigmatic veins; second oblique vein arising somewhat nearer the first 

 oblique than the stigmatic vein, diverging from the former slightly, so that 

 the first discoidal cell between them is only two or three times as broad on 

 the hind margin as at the base. 



The name is given with reference to the weakness of the cubital vein, 

 which it shares with Anconatus. 



A single species is known. 



AMALANCON LUTOSUS. 

 PI. 18, Fig. 13. 



The dark head and thorax of an insect are all that remain of the body 

 with a part of the legs and most of one fore wing. The thickened post- 

 costal vein is very slightly sinuous and blends apically into the stigma. 

 The first oblique vein is straight and at an angle of fifty degrees with the 

 postcostal ; the second also straight and at an angle of forty-five degrees 

 with the same, the first discoidal cell being two or three times broader on 

 the hind margin than at the base. The cubital vein, exceedingly weak, has 



