from the Rio Xautla, State oj Tcra Cruz. 31 



strong and thick, decussate; vibrissas moderately strong- and 

 deeu-ssate. Wings very broad at base, 3 millim. broad in 

 tlie larger specimens by about 5 millim. long, rather strongly 

 but irregularly yellowish fuscous on costal halt', whitish on 

 inner portion, rather blunt and rounded at tip. The costal 

 fuscous area contains three whitish or hyaline streaks, the 

 darkest fuscous being in vicinity of stigma and containing 

 but one streak of hyaline. The other two streaks are in 

 second costal cell and tip of submarginal. Third vein bowed 

 inward on apical portion, so that the long jjctiole of apical 

 cell forms a right angle with apical cross vein. Hind cross 

 vein distinctly but not strongly sinuate, distinctly nearer to 

 bend of fourth vein than to small cross vein, the bend of 

 fourth being sharply or abruptly rounded, with the two 

 sections running from the bend at right angles and of equal 

 length. The petiole of apical cell ends well behind the 

 actual centre of wing's tip, owing to its bending posteriorly 

 out of a straight line on apical portion. The hind cross vein 

 is oblique, and with its peculiar curvature, aided by the 

 curvature of fourth and lifth veins, gives the discal cell a 

 shape very similar to that of a gunstock. 



Front about as wide as eyes anteriorly, hardly or but 

 slightly narrower posteriorly, with a wide velvet-black vitta 

 slightly wider behind. Orbital margins of front and whole 

 of face silvery white, the orbits with a slight golden shade, 

 especially on front. Antennae blackish, reaching but little 

 more than halfway to oral margin ; third joint hardly twice as 

 long as first. Palpi brownish, slender, clubbed at the end. 

 Occiput and pleurae brassy-silvery pollinose. Thorax shining 

 black, so marked with pollinose as to show on prrescutum five 

 silvery and four rust-black or deep black vittaj, the three silvery 

 and two black median ones being the most clearly defined, 

 and the lateral silvery ones terminating in the humeri. The 

 silvery vittee are sometimes golden-tinged. These vitt^ are 

 more or less distinctly continued on mcsoscutum behind 

 suture, the scutellum showing some silvery pollen apically 

 when not discoloured. Abdomen blackish or brownish, 

 elongate-oval, flattened, the whole with more or less of a 

 metallic purplish tinge, with more or less of a thin coating of 

 very fine pale brassy or ashy pollen, with first two segments 

 more or less pale subtransluceut brownish yellowish, except 

 a median vitta which is continued indistinctly on other 

 segments. The yellowish colour is often faint, sometimes 

 obsolete ; when present it leaves normally a narrow posterior 

 margin of brown on second segment. Legs black or brownish 

 black, the knees, tibiae, and tarsi sometimes varying to lighter 



