1/2 CONNECTICUT GEOL. AND NAT. HIST. SURVEY [BuU. 



Genus Boyeria McLachlan 



Nymphs, — Caudo-lateral margin of the head angulate ; proxi- 

 mal segment of labial palpus truncate at apex ; mental cleft closed ; 

 abdomen with lateral spines on segments 5-9, but no dorsal hooks 

 on any of them. 



Adults. — Upper section of arculus as long as the lower; M. 

 not making a sharp bend towards M^ at end of stigma; Rs not 

 forked and i to 2 rows of cells between it and the supplementary 

 radius ; triangle, supertriangle and basilar space with cross-veins ; 

 cells of anal loop numerous (9 or more) in several rows; cubito- 

 anal cross-veins about 5-6 in number; anal angle of the hind 

 wings dissimilar in the two sexes, the anal triangle of the male 

 usually with 5 cells ; thorax brown, green and yellow ; abdomen 

 with a single lateral keel per segment on each side ; inferior anal 

 appendages of the male entire. 



The nymphs of our one representative have been found most 

 frequently in meadow brooks or woodland creeks among roots or 

 driftwood. 



Key to Species 



Adults 



Males and Females 



I. Pale spots on sides of the thorax and abdomen sometimes blue in 

 color ; superior anal appendage of the female about as long as 

 segment 10 (1.5 mm.) ; tips of the wings brown, the remainder 



clear grafiana 



Pale spots on the sides of the thorax and abdomen yellow; supe- 

 rior anal appendages of the female much longer than segment \o 

 (3.5 mm.) ; entire wing brown vinosa 



Boyeria grafiana Williamson 



Entomological News, 18: i: 1907. 



This species has been captured in Massachusetts and Pennsyl- 

 vania, and there is a possibility that it may be found in Connecticut. 

 The adults are fairly well distinguished by the characters in the 

 key. 



Boyeria vinosa (Say) 



Journal of the Academy of Natural Sciences of Philadelphia, 8: 13: 1839. 



N5miph (PI. Ill, Fig. 4). — Color dark brown. 



Head : mentum extending between the middle coxae ; cephalic 

 margin with a closed cleft, a fringe of hairs and a tooth on each 

 side of the cleft; proximal segment of the palpus squarely trun- 

 cate (Fig. 7, No. 6), with a denticulate mesal edge; antennae with 

 the first two and last segments darker in color than the rest ; com- 

 pound eyes, with dorso-mesal extension rounded and separated 

 from each other by approximately 1.5 mm. on the meson; caudo- 

 lateral margins of the head sharply angulate. 



