GEOMETRIDiE. BOARMIA. 191 



Like its congeners extremely variable in colour ; but known by the large quadrate 

 patch adjoining the denticulated striga on the anterior wings. 



Birch-wood is tlie only locality I know for the capture of this 

 species, where I have once taken it, and seen others secured, in the 

 beginning of May. 



Sp. 2. Abietaria. Alls griseis atomosis, strigis communibus denticulatis satu- 



ratioribus. (Exp. alar. 1 unc. 6 — 8 lin.) 

 Ge. Abietaria. HawortL— Bo. Abietaria. Steph. Catal. part ii. p. 125. No. 



6505. 



Wings pale griseous, with minute fuscous irrorations and several darker common 

 denticulated strigiE, varying considerably in number in different specimens, 

 but the anterior have usually a curved one towards the base, and a more 

 distinct repanded one behind the middle, near the centre of which, on the 

 outside, is a subquadrate dusky patch, and some nebula? of the same hue on 

 its outer edge and towards the hinder margin of the wings, near which is an 

 undulated pale striga ; the extreme edge of all the wings with a few black 

 spots, sometimes united by a very fine black line. 



The basal strigse on the posterior wings are very frequently obliterated ; in fact, 

 it is difficult to find two specimens precisely similar : the colour also varies 

 exceedingly, some specimens having the ground of a very deep fuscescent 

 griseous, and others nearly cinereous. 



Duponchel appears to consider this insect and the following as varieties of 

 Hiibner's Ge. consobrinaria. 



Far from rare in some of the metropolitan woods in March and 

 April, especially at Coombe and Birch Woods. " Epping." — Mr. 

 Douhleday. " Kimpton, common." — Rev. G. T. Rudd. 



Sp. 3. crepuscularia. Alis albidis subaiomosis, strigis communibus denticulatis 



fuscis. (Exp. alar. 1 unc. 6 — 7 lin.) 

 Ge. crepuscularia. Wien. Verz.—Bo. crepuscularia. Steph. Catal. part ii. p. 1 25. 



No. 6506. 



Wings whitish, or white, sprinkled with fuscous, and a Uttle clouded with 

 griseous, with several repanded common denticulated fuscous strigse, varying 

 in number in different examples, as in the preceding species ; on the costa 

 are some very distinct equidistant black spots, whence the strigae arise, and 

 on the hinder margin of the wings a series of darker triangular ones ; cilia 

 immaculate white. 



Smaller and whiter than the preceding, but slightly variable in tint. 



Equally abundant with the last, in the same localities, but found 

 in the beginning or middle of May, and in June. " Allesley and 

 Co\e%\i\\\."—Rev.W.T.Bree. ''E^fmg."—Mr.Doicbleda?/. "Kes- 



