OF NORTH AMERICA. 183 



ZYGEmBM. 

 ZYGEmiNE. 

 ' Genus ACOLOITHUS. Clemens. 



" The following insect greatly resembles americaria in appearance 

 and almost exactly in ornamentation. It must however be very dis- 

 tinct from it. The wings are extremely narrow. Hind wings broader 

 than the fore wings, less ovate than in ameruana, 

 and rounded at the interior basal angle ; length 

 rather more than that of the body. The disc of the 

 wing is closed by a faint, irregularly oblique vein, with one 

 disco-central nervule, and angulated at the medio-superior nerv'ule, 

 where it receives a rather faint discal fold. The subcostal vein with 

 three equidistant, moderately erect marginal nervules frojji the disc, 

 with the apical vein simple. Median vein four-branched, with the pos- 

 terior nervule and the marginal opposite at their origins. The fold is 

 thickened and the submedian vein simple. In the hind wings the sub- 

 costal vein shows a tendency to separate into two veins from its point 

 of bifurcation towards the base of the wing and resembling two veins 

 crossing each other, exterior to the point of bifurcation and a little 

 behind the middle of the lower branch arises a decided, curved discal 

 vein, which receives, just above the medio-superior nervule, a decided 

 or thickened discal fold. The median vein is four-branched, with the 

 two posterior branches equidistant from the second one. 



" Head moderate, free, smooth ; with large ocelli. Face broad, 

 rounded. Eyes rather small, round and scarcely prominent. Antennae 

 nearly as long as the body, moderately pectinated in the 6 , minutely 

 pectinated in the ? . Palpi equal to the front, filiform, porrected, dis- 

 tinctly three-Jointed, and with the joints nearly equal ; terminal joint 

 obtuse. Tongue about half as long as the thorax beneath. 



" Body short, rather slender, not metallic. Patagia very minute. 

 Abdomen as long as the thorax beneath, not tufted at the tip and 

 scarcely tufted along the sides, with a minute lateral tubercle on the 

 basal segment. Legs extremely slender and rather short ; fore tibiae 



