1874.] 201 [Morrison. 



a series of transverse black bands between the segments ; beneath 

 light gray. Anterior femora dark brown. Tarsi of all the legs 

 white and black alternating. Anterior wings above, gray, almost 

 entirely covered with olivaceous spots and bands. Interior and exte- 

 rior lines and median shade, black, very rarely forming continuous 

 lines. Interior line curved, consisting of three black, ill-defined 

 spots, on the costa, median nervure and inner margin, seldom con- 

 nected together. Median shade consisting of spots arranged in the 

 same manner as in the interior line; in one specimen this line is 

 distinct and connected. Exterior line parallel to the outer margin, 

 commencing on the costa, five-sevenths of the distance from the base 

 to the apex and consisting of black spots on the nervules, some- 

 times partially connected together, terminating on the inner margin, 

 very close to the median shade. At the termination of these two 

 lines on the inner margin, there is frequently a gemminate black 

 blotch. Two conspicuous, sub marginal, parallel, dentate, olivaceous, 

 bands, including one of the ground color. The first is the most 

 strongly marked. These bands, or traces of them, are present in 

 every specimen which I have examined. A series of marginal black 

 spots. Posterior wings above gray, thickly powdered with olivaceous 

 atoms. Discal dot present. In about one specimen in three there 

 are traces of the exterior line, and in one in five or six the first sub- 

 marginal band can be seen. A marginal black line. Fringe gray. 

 Wings beneath smoky gray, with the lines above not reproduced. 

 Anteriors free from spots. Posteriors sprinkled with dark atoms. 

 Discal dot distinct on both wings. 



? . Antennae simple, finely alternated with black and white. Head 

 as in the male. Thorax and abdomen dark gray. Abdomen with 

 two dorsal, longitudinal, black bands, enclosing one of the ground 

 color. Two series of black spots along the sides of the abdomen ; 

 the upper one is only present on the middle segments. Wings rudi- 

 mentary, 1 to 2 mm. in length, generally uniform gray. In one spec- 

 imen the wings are 3 mm. in length, with traces of lines and spots. 



Hab. Massachusetts. From April 20th to May 5th. Collection of 

 H. K. Morrison. 



Olivacearla is closely allied to strigataria Minot. (Anisopteryx ? strig- 

 ataria Minot). But there are two constant characters which will al- 

 ways separate the males of the two species. 1st. The olivaceous col- 

 or of the wings, particularly the anteriors; in strigataria the wings are 

 gray, without any trace of olive green. 2d. In strigataria the three 



