312 A. L. MELANDER. 



Described from two males taken at light at Arrogo, August 23d, 

 and at Colorad, July 10th, New Mexico. Contributed by Professor 

 Cockerell. Type in collection of the National Museum. 



This species apparently comes near orestes and melicausa, but 

 differs in the darkened legs, maculate wings and structure of the 

 mesosternal teeth. 



70. Hut ilia territa Cockerell (106). 



Three specimens, one of which is castaneous, from Colorado and 

 Las Cruces, New Mexico. July and September. At light. 



71. Untilla Erebus sp. nov. 



Eufotestaceous; head rounded, sparsely punctulate, prothorax conflueutly 

 punctured, mesonotal punctures coarse, slightly separated, reticulum of meta- 

 thorax large, mesosternum with two sharp teeth, petiole of abdomen deeply 

 punctured, nodose apically and strongly constricted from the sparsely punctulate 

 second segment, abdominal segments with a narrow fringe of plumose hairs, legs 

 testaceous, wings hyaline, veins testaceous, third submarginal wanting. 



Male. Rufotestaceous. Head but little produced behind the eyes, occipital 

 angles not broadly rounded ; sparsely and finely punctate; ocelli large, the hind 

 ones one-third further from each other than their distance to the eye, no groove 

 between the antennae, but at the very base of the shallow clypeus is a short, 

 sharp, truncate, transverse projection continued laterally and posteriorly as a 

 fine carina, clypeus sparsely punctulate; mandibles strongly rounded, tip black- 

 ened, basal tooth moderate, their hairs short; antennae concolorous with the 

 body, scape testaceous, subconfluently punctured ; the hairs of the head are 

 sparse and white, consisting partly of long, serrate, erect ones and partly of short 

 proclinate ones. Prothorax confluently punctured, mesonotal punctures strouger 

 and deeper but separated, parapsidal grooves abbreviated on the front third, scu- 

 tellum rugosely punctured, metanotum very coarsely reticulated, the basal areas 

 small, equalling three normal spaces, mesopleurae punctured, the punctures be- 

 coming areolated towards the coxae; mesosternum armed with two strong, acute, 

 downward-projecting teeth near their anterior portion. Petiole of abdomen one 

 and two-thirds times as long as broad, the apical margin twice as broad as the 

 basal, subcampanulate in outline but not suddenly narrowed in front, quite 

 strongly nodose, the hind margin constricted, punctuation dense and deep along 

 the sides but becoming more or less sparse on the dorsum ; second segment 

 sparsely punctulate above and below, remaining segments minutely punctulatp, 

 last dorsal finely aciculate, but not margined. Coxae and legs testaceous over all. 

 the spurs and spines concolorous, but the hairs whitish yellow. Wings hyaline, 

 veins testaceous, stigma fusco-testaeeous, second discoidal and third submarginal 

 completely wanting, marginal, first submarginal and first discoidal cells slender, 

 first submarginal receiving the recurrent vein just before the middle of the cell. 

 Vestiture of thorax and abdomen sparse whitish, partly erect and partly deliv- 

 ous, the hairs presenting a serrate appearance, becoming plumose about the base 

 of the wing, the metanotum and the abdominal incisures, so as to give a fasciate 

 appearance to the abdomen. 



Length, 11 mm. 



Fig. 48; occiput: fig. 50 ; mesosternum. 



