36 E. T. CRESSON. 



Cimhox Hliigii Leach, Zool. Misc. No. 6; St. Farg. Mon. Tenth., .32.— 

 "9- — Anteniife yellow; head and thorax black; abdomen violaceous-black, 

 with five yellow bands above, the first two and the last interrupted; legs 

 violaceous-black, tarsi yellow; wings hyaline, apex and second radial cell 

 anteriorly subfuscous." 

 Hah. — San Domingo. 



PTESTOS Norton. 



Vtilia, Sec. 2, Norton, Trans. Am. Ent. Soc. ii, p. 367, 1869. 



" Wings with one marginal, appendiculate cell and four sub- 

 marginal cells, the second receiving two recurrent nervures; the 

 second cell is long and the third is wider than high; lanceolate cell 

 petiolate. Under wing not appendiculate, and with two inner cells. 

 Antennae three-jointed, slender, furcate in males, ciliate ; maxillary 

 palpi four-jointed. Legs as in PtiUa ; tarsi without processes be- 

 neath, not dilated, first joint longest; tibiae with two apical spurs, 

 no side spurs." 



Ptenos niger Norton, Trans. Am. Ent. Soc. iv, 77. — "%. — Length 0.20; 

 br. wings 0.46 inch. — Color black: antennae not as long as thorax, slender; 

 third joint furcate, with long coarse cilise, bent at tip, piceous; a piceous spot 

 on each side of thorax, the edges of basal plates, of first segment, and of each 

 segment of venter, piceous; palpi pale; nasus and labrum fringed with white 

 hair; abdomen thick; legs blackish-piceous, with the apex of femora and most 

 part of tibise pale, their base piceous; wings hyaline, basal half violaceous, 

 Bubobscure, stigma piceous." 



iTai.— Texas. (Coll. Am. Ent. Soc.) 



Pteiios nigropectus Norton, Trans. Am. Ent. Soc. iv, 77. — " % . — Length 

 0.22; br. wings 0.46 inch. — Head, most part of thorax and apex of tergum 

 black; tegulse, collar, anterior angle, sutures of metathorax at sides, and most 

 of abdomen yellow-red; the very broad membranous notch waxen whitish; 

 the four anterior legs yellowish below the tips of femora, black above; hinder 

 legs black, becoming piceous below the femora; stigma and costal s[)ace yel- 

 lowish, basal half of wings smoky-yellow, apical half clearer, nervures black- 

 ish; autennse furcate, ciliate, slender, shorter than thorax, cilise black." 

 Hab. — Texas. (Coll. Am. Ent. Soc.) 



H.ylotoma consobriiia Norton, Trans. Am. Ent. Soc. iv, 78. — "J. — 

 Length 0.40; br. wings 0.80 inch. — Antennse clavate, black, with the two basal 

 joints pale; head, thorax and the four and a half basal segments of abdomen 

 brown-yellow; mouth whitish; the three and a half ap-cal segments of tergum 

 black; legs yellow, the middle of all the femora, the apical two-thirds of all 

 the tibiae, and all the tarsi black, except the basal two-thirds of the first, which 

 is pale; spines yellow; less of black on the anterior femora; wings blackish 

 at base and tip beyond the stigma; a broad yellow band across the middle; 

 nervures the color of bands; body slender; ridge between antennas flattened 

 80 as to form a triangular enclosed space." 



Hah. — Mexico. (Coll. Am. Ent. Soc.) 



