August —December 1SS9.] 



PSrCHE. 



245 



low ; last segments darker brassy, with a 

 broad, dorsal, yellowish white, median 

 band on the penultimate segment, and a 

 narrower one on the last, which ends 

 on the sharp apical carina ; appendages 

 black, sharp ; sides of last segments and 

 valves yellow, with a black palpus ; 

 wings similar, with a more yellowish 

 tinge ; a very small yellow pterostigma, 

 a little dilated in middle, variable in 

 size, covering two to five cells, some- 

 times with transversal ; between one 

 and two mm. long, or less. 



Male Female 



Length. 55 48 



Abdomen. 45 38 



Exp. al., 75 75 



Hab. Dublin, New Hampshire, near 

 Thorndike pond, 1300 ft. above sea 

 level, z females, June 18, 1SS7, and 4 

 males and 3 females June 23, 1S89, 

 by Mr. Louis Cabot. 



The hind wings with brown apical 

 color, and the yellow pterostigma of all 

 females are good characters for C. 

 amata. 



3. CaLOPTERYX DIMIDIATA. 



Calopteryx dimidiata Burm. Handb. 

 V. 3, 836,16 fem. Selys Monogr. Cal. 

 34,4. — Syn. Cal. 10,4. — Walker, 

 Catal. Br. mus. 591,4- — Hagen, Syn. 

 Neur. N. A. 56,1 ; Stett. ent. zeitung, v. 

 24, 373,35 ; Proc. Bost. soc. nat. hist. 

 V. 16, 364,53 (both on Abbot's figure). 



Calopteryx cognata Ramb. Neur. 

 323,6 female. 



Calopteryx syriaca Ramb. Neur. 

 223,9 i^ote, male. 



Male, metallic blue, on thorax and 

 end of abdomen changing parti v to 



green ; labium, head below and an- 

 tennae black ; labrum and epistoma 

 metallic blue, shining ; tubercle on 

 occiput sharp ; crista of the thorax, all 

 sutures and below black ; legs black ; 

 abdomen black below ; appendages of 

 the typical shape, black ; wings narrow, 

 hyaline with light yellowish tinge, the 

 apical part black, with the inner border 

 of the black straight ; reticulation 

 black, costa steel blue ; front wings 33 

 to 27 antecubitals ; in the quadrangular 

 space 6 to 8. 



Female adult, metallic green, head 

 and prothorax sometimes changing to 

 blue ; colors as on the male ; thorax 

 more evident in younger specimens 

 with the second suture and the ventral 

 border and below yellowish ; legs and 

 the more numerous spines black ; hind 

 legs reaching to the beginning of the 

 fourth segment ; abdomen very slender, 

 metallic green, last segment dark ; be- 

 low entirely black , appendages black ; 

 the lateral border below the appendages 

 with 4 to 5 small teeth ; wings hyaline, 

 very slightly yellowish ; apex of hind 

 wings brown in the last quarter, the 

 inner margin straight ; apex of front 

 wings brownish, not so well defined ; 

 pterostigma large, white, dilated in mid- 

 dle, crosseil by some transversals ; re- 

 ticulation black ; the costa and axillary 

 callus steel blue ; the sinus before the 

 wing-base with the posterior border 

 straight ; 20 to 35 antecubitals ; quad- 

 rangular space 4 to 6 transversals. 



The young females have the wings 

 hyaline, with a little yellowish tinge, 

 not brown on tips, except a liglit 



