326 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Rhyssa Gravenhorst. 



Nearly as large as Megarhyssa; black, with yellow mark- 

 ings; wings transparent and tinted with yellowish or yellowish 

 brown; legs mostly reddish stramineous. 



Key to Species. 



Antennae with a yellow annulus albomaculata 



Antenna? without a yellow annulus, but uniformly blackish.. 



persuasoria 



R. albomaculata Cresson. 

 Hamden, 15 June, 191 1 (W. E. B.). 

 R. persuasoria Linnaeus. 



Arotes Gravenhorst. 

 Length 10-17 mm.; antennae with a yellow annulus or with 

 the greater part of the apical half yellowish except tips. 



Key to Species. 



1. Second recurrent vein interstitial with cubital vein 2 



Second recurrent vein not interstitial with cubital vein 4 



2. Mostly black, with yellowish maculae 3 



Stramineous, with black maculae; exserted portion of ovipos- 

 itor about as long as abdomen venustus 



3. Hind femora black; exserted portion of ovipositor about as 



long as body f ormosus 



Hind femora testaceous; exserted portion of ovipositor longer 

 than abdomen vicinus 



4. Hind femora not black 5 



Hind femora black, tipped with yellowish; exserted portion 



of ovipositor as in f ormosus amoenus 



5. Hind femora stramineous, tipped with black; exserted por- 



tion of ovipositor as long as or a little longer than body . . 



decorus 

 Hind femora stramineous throughout or at most with ex- 

 treme base brownish vicinus 



A. amcenus Cresson. Howard, Insect Book, PI. x, Fig. 24. 

 Colebrook, 12 July, 1905 (H. L. V.). 

 A. decorus Say. 

 A. vicinus Cresson. 

 A. formosus Cresson. 

 A. venustus Cresson. , 



