1 2 CONNECTICUT GEOL. AND NAT. HIST. SURVEY [Bull. 



moerens McDunnough. Ibid., 525 (H.T.S.) 

 volitans McDunnough. Ibid., 530. (H.T.S.) 



Family EPHEMERELLID^E. 



Ephemerella Walsh. 



dorothea Needham. Biol. Mayflies, 594. (H.T.S.) 

 fuscata Walker. Ibid., 600. (H.T.S.) 

 invaria Walker. Ibid., 607. 

 minimella McDunnough. Ibid., 612. (H.T.S.) 

 needhami McDunnough. Ibid., 614. (H.T.S.) 

 prudentialis McDunnough. Ibid., 616. (H.T.S.) 

 septentrionalis McDunnough. Ibid., 618. (H.T.S.) 

 serratus Morgan. Ibid., 619. (H.T.S.) 

 subvaria McDunnough. Ibid., 622. (H.T.S.) 



Family BMTIDJE. 



Baetis Leach. 

 frivolus McDunnough. Biol. Mayflies, 690. (H.T.S.) 



Callibaetis Eaton. 

 pretiosus Banks. Biol. Mayflies, 672. 



Family SIPHLONURID^E. 



Isonychia Eaton. 

 bicolor Walker. Biol. Mayflies, 486. (H.T.S.) 



Siphlonurus Eaton. 

 berenice McDunnough. Biol. Mayflies, 468. 

 qubecensis McDunnough. Ibid., 474. (H.T.S.) 

 rapidus McDunnough. Ibid., 475. 



Family HEPTAGENID^l. 



Arthroplea Bengtsson. 

 bipunctata McDunnough. Biol. Mayflies, 426. (H.T.S.) 



Heptagenia Walsh. 

 minerva McDunnough. Biol. Mayflies, 354. 

 townesi Traver. Ibid., 363. (H.T.S.) 



