210 



PSYCHE. 



[March 1895. 



yellowish-green, marked witli brown as 

 follows: ;\ narrow mid-dorsal band, widest 

 in the middle, narrowed at each end, in front 

 barely wider than the mid-carina which may 

 be partly pale, continuous behind with the 

 brown of the ante-alary sinus; a very 

 narrow humeral stripe, widest above, where 

 it is partly divided by a pale streak on the 

 suture; and an equally narrow ante-humeral 

 stripe separated from the humeral by a 

 green band of equal width which is continu- 

 ous above with the green of the dorsum, 

 thus separating the ante-humeral stripe from 

 the sinus. Legs with the basal | of femora 

 green (sometimes fuscous above), otherwise 

 black. Abdomen dark brown marked with 

 yellow as follows: J, dorsum of i and 2; 

 basal half to two-thirds of 3-8 with a tri- 

 angular spot, produced apicRlly; 9 with a 

 quadrate or orbicular spot on basal third, 

 with an apical tail ; 10 with a lanceolate 

 spot, its apex reaching the hind margin; 

 ventr;il portions of sides of 8 and 9 and 

 indications on the same portions of 

 preceding segments. $ similar, more 

 suffused. 10 one-half as long as 9 in both 

 sexes. Vulvar lamina § as long as 9, bifid 

 for a little more than its apical half, the 

 branches sliglitly divergent at first, then 

 convergent, the tips contiguous, their apices 

 rounded or with a minute tooth, the basal 

 inner half of each branch somewhat thick- 

 ened. Superior appendages of $ as long as 

 10 and 4 of 9. Seen from above the basal 

 half is i as broad as long, the distal half 

 smootlily tapering, with straight sides, 

 acute, sharp; the inner margin of the basal 

 half is deeply concave, the outer margin 

 slightly so. Seen from the side the sup. 

 app. is a little upturned at the tip, :icule, 

 almost acuminate; the dorsal margin 

 strongly sinuate, being slightly concave at 

 the basal fourth, strongly convex at the 

 half, and distinctly concave on the distal 

 third. Its lower margin is deeply excavate 

 at the basal fourth, strongly convex and 

 denticulated on the remaining portion; the 

 distal i of the outer ventral face of the 



appendage is convex in both longitudinat 

 and transverse section and thickly beset 

 with black denticles; the narrowed basal 

 part is a little stouter than the correspond- 

 ing part of the inf. app. Inferior appendage 

 i as long as sup. app., the lower margin 

 of the branch straight, slightly ascending, 

 the upper margin concave on the basal J, 

 straight and descending on the apical third, 

 forming a tooth-like process at the two- 

 thirds point and an acute apex. 



- <? 1 3 ?' northeastern U. S. (probably 

 Wellesley, Mass., but if not, then Ohio, 

 Ind., or III.) ; one 9 received from S. F. 

 Denton, the remainder from S. W. Denton. 



Tetragoneuria indistincta, sp. nov. 



Very similar to T. cynosin-a Sa^', but 

 somewhat larger and difl'ering from it as 

 follows: a black T spot on front above; 

 pubescence of thorax deep brown, instead of 

 somewhat hoary; wings slightly fumose 

 and a little (2 mm.) longer, the basal part 

 of median space and basal antecubital cell of 

 each series fuscous; pterostigma slightly 

 longer; abdoiuen longer (2 mm.), more 

 slender, especially toward apex, ninth 

 segment nearly as long as the width of its 

 posterior margin, 10 also distinctly longer 

 proportionally than in cynosura j superior 

 appendages 2.7 mm. long, fusiform-cylindric, 

 a little slenderer at base, their apices 

 rounded {o{ cynosura 1.8 mm. long, and the 

 apices sharply pointed). 



Abdomen 29 mm.; hind wing, 31. i ?, 

 Winchendon, Mass., July 2. 



This species has probably been con- 

 fused with T. cyttosu?-a Say. In fact, 

 much confusion has e.visted and 

 perhaps still exists concerning the 

 forms known as cynosura^ seniiaqjiea, 

 and others closely allied to them. 

 I regret to sa}' that even the specimens 

 in the Hasen collection arranged imder 

 these names are sadly mixed, the same 



