546 



patch ill black speckles near the interior angle. Hind wings extending a 

 little behind the abdomen ; exterior border slightly denticulated, with a very 

 prominenl angle in the middle. Length of the bod}' 5 lines; of the wings 

 16 lines. Easl Florida." 



TETRACIS Guene"e. Plate 5, fig. 18 ; plate 6, fig. 2. 



Tetrads Guen., Phal., i, 140, 1657. 



Walk., List Lep. Her. Br. Mus., xx, 17a, 1860. 



I lead large, prominent, lull in front, moderately broad, narrowing a little 

 anteriorly. Palpi thick, either short, not passing much beyond thewfront, or 

 large, acute, and extending beyond the front by a distance nearly equaling 

 the width of the front of the head. Male antennae either simple and thick- 

 ened, or with short pectinations. Thorax moderately stout and hairy, not so 

 pilose and thick as in Ennomos. Fore wings with the costa usually quite 

 straight and slightly sinuous, distinctly falcate, the apex produced, acute or 

 subacute; the outer edge excavated more or less below the apex, and with a 

 very prominent median angle, much larger in the female than in the male. 

 Hind wings usually large, extending beyond the end of the abdomen, well 

 rounded on the apex, with a large acute tooth or angle in the middle; some- 

 times the angle in the males is nearly wanting. Venation: the costal area 

 is very narrow, and the free end of the costal vein and the first three sub- 

 costal venules short, one short (crocallata), sometimes (truxaliatd) a rather 

 long and narrow cell. The discal venules vary in the anterior one being 

 straight and curved inward ; the posterior one is usually oblique, directed 

 outward The hind tibiae in the male are either moderately or considerably 

 swollen, the tarsi nearly as long or three-fourths as long as the tibiae. 

 Abdomen usually long and slender in the male. Coloration: either cream- 

 white or yellow, with a single oblique brown line on the fore wings, or 

 yellow with brown bands, or of different shades of ocbreous, with dark lines 

 and thickly speckled. 



From the material before me, I have been unable to perceive any essen- 

 tial difference between Tetrads and Eugonia; they run into each other 

 insensibly. The species differ from those of Eugonia in the less heavily- 

 pectinated male antennae, the less pilose thorax, the shorter palpi, and in the 

 wings nol being, dentate, though those of <$ E. subsignaria arc not so. From 

 Eulrapela they differ in thew.ings being narrower and much more angular and 



