74 BRITISH MOTHS 



Species 5. — Ptychopoda bisetata ' — (Plate LXXII., Fig. 8) — Measures 10 lines in expanse ; wbgs 



whitish clay-coloured : the anterior with the costa towards the base, and an indented striga of brown beyond 



the middle, and followed by a fascia composed of somewhat confluent dark spots, and a short waved striga next 



if . . ^_^ the anal angle, also occasionally with two anterior very slender evanescent dusky strigae preceding the ordinary 



h.i'- dark central dot ; hind wings with a subapical dusky striga far beyond the ordinary central dark dot ; the apical 



margin with a row of brown dots. Taken in June, in the woods of Kent and elsewhere. 



" Synonvmes — Geometra bisetata, Hufnagle ; TreitschUe ; Duponchel, 1 73-4 ; Stephens. 



S/tS. 2/c*i- 



Specles 6. — Ptychopoda trigeminata b — (Plate LXXII., Fig. 7) — Measures 10 hues in expanse; wings 

 whitish clay-yellow : the base of the costa and a posterior fascia formed of three geminated subconfluent blackish 

 spots, and occasionally with two almost evanescent dusky strig£e preceding the ordinary dark central dot ; hind 

 wings immaculate, or with a submarginal dusky striga. Taken at the end of May in hedges. Probably a variety 

 of the preceding species. 



'' Synonymes. — Phalmna trigeminata, Haworth. Geometra scHtularia, Hubuer. 

 B. Hind tibicB of the females with one pair of spurs near the middle, and a second pair at the apex. 



Species 7. — Ptychopoda ornata ^' — (Plate LXXII., Fig. 9) — Measures from 1 to 1^ inch in expanse; 

 wings snow white, scarcely clouded, with a black dot in the middle, and a moderately broad elegant apical 

 border to all the wings, formed of gray, whitish, and brownish spots and strigse, united together and edged within 

 with black, through which runs an undulating white line ; the apical margin with an interrupted black and 

 brown line. This elegant species occurs in chalky places in Kent and other places in the south of England, in 

 July, and is far from rare. 



"^ SvNONYMES. — Geometra oriiata, Wien. Vera. ; Hiibner ; Ha- : Phalana instilata, Hufn^le. 

 worth; Stephens. I Geometra pu/«(/a(a, Sam ouelle, Villare. 



Species 8. — Ptychopoda incanata <■ — (Plate LXXII., Fig. 10) — Measures about 1 inch in expanse. 

 ^l,2>, and has the wings grayish buff, powdered with brown, with the ordinary black subcentral dot, and with obscure 



dusky waved strigse : the first, which is much curved, is sometimes obsolete ; the second is repanded beyond 

 the dot ; and the third is between it and the apical margin ; beyond this is a nearly obsolete row of brown dots 

 running across all the \vings ; and the margin itself has a row of dark somewhat triangular dots. Generally 

 found on the coast, in Norfolk, Kent, Devonshire, &c., about the beginning of August. 



Geometra contiguakia, Hiibner; Haworth; and our PI. 76, fig. II, is regarded as a variety of the 

 preceding, being rather larger, with paler wings, and more strongly marked and denticulated strigae. It is 

 found in the same localities. 



"^Sywonymes Phal(Ena Geometra incanata, lAnu^m ; Haworth; Stephens. 



Geometra immutaria, Hiibner, nee. Liun^us. 



Species 9. — Ptychopoda immutata i' — (Plate LXXII., Figs. 12, 13) — Measures 10 or 11 lines in 

 expanse, with the wings cream-coloured or whitish, with the small dark subcentral dot conspicuous, and with 

 about five lutescent striga, nearly equidistant, slightly undulated ; the posterior ones often nearly evanescent ; 

 the fi'inge generally dotted with black at the base. Taken in Norfolk and Huntingdonshire, in marshy places, 

 about the beginning of July. The caterpillar is whitish, with the back purplish, dotted with black, and with 

 red brown lateral patches. 



'' Synonymes. — PhaUenn Geometra immutata, Linnsus ; Ha«ortb ; Stephens, nee. Hiibner. 

 Geomelru si/lveslraria, Hiibner ; Treitschke. 



