54(5 



patrli ot lilack speckles near the interior angle. Hind wings extending a 

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

 prominent angle in the middle. Length of the body 5 lines ; of the wings 

 16 lines. East Florida." 



TETRACIS Giiende. Plate 5, fig. 18 ; plate 6, fig. 2. 



Tetrads Guen., Phal., i, 140, 1857. 



Walk., List Lep. Het. Br. Miis., xx, 172, 1860. 



Head large, prominent, full in front, moderately broad, narrowing a little 

 anteriorly. Palpi thick, cither short, not passing much beyond the front, 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 Einionios. Fore wings with the costa usually quite 

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

 sul)acu1('; the outer edge excavated more or less below the apex, and with a 

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

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

 rounded (ui 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 {truxuUatcC) a rather 

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

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

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

 swollen, the tarsi nearly as long or three-tburths as long as the tibijie. 

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

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

 yellow with brown l)aiuls, or of diflerent shades of ochreous, with dark lines 

 and thickly speckled. 



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

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

 insensibly. The species differ from tiiose of Eugovid in the less heavily- 

 l)ectinated male antenntc, the less pilose thorax, the shorter jialjii, and in the 

 wings not being dentate, though those of 6 E. suhsignaria are not so. From 

 Eufrapeld ihey (^x^er'm the wings l)eing narrower and much more angular and 



