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



mid legs mostly yellow, hind legs mostly brownish stra- 

 mineous, except their coxae, which are black irritator 



2. Length over 14 mm 3 



Length less than 14 mm 4 



3. Exserted portion of ovipositor much longer than body; 



legs mostly brownish stramineous, except hind tibiae and 



hind tarsi, which are brown tuberculatus 



Exserted portion of ovipositor not much longer than body; 

 legs as in tuberculatus mesocentrus 



4. Exserted portion of ovipositor as long as or shorter than 



body 5 



Exserted portion of ovipositor longer than body; legs as in 

 tuberculatus macer 



5. Exserted portion of ovipositor as long as body; legs as in 



tuberculatus comstocki 



Exserted portion of ovipositor shorter than body; fore and 

 mid legs yellow, except their tarsi, which are more or less 

 brownish; hind legs in female with coxae and femora mostly 

 reddish stramineous, their trochanters, tibiae, and tarsi 

 mostly brown; in male, hind coxae stramineous and femora 

 of hind legs mostly brown albipes 



I. irritator (Fabricius). Howard, Insect Book, PI. x. Fig. 8. 

 This is an American parasite of the cosmopolitan beetle Cryp- 

 torhynchus lapathi. Also parasitic on Liopus variegatus. 



Sahsbury, 27 August, 1904 (W. E. B.) ; New Haven, 21 

 April, 1911 (A. B. C). 



I. tuberculatus (Fourcroy). 

 °I. (Calliephialtes) comstocki (Cresson). 

 Tegulae white; veins fuscous, stigma also fuscous, but with 

 a pale spot at base. Parasitic on Evetria comstockiana, which 

 bores into the twigs and small branches of the pitch pine {Pinus 

 rigida). 



°I. albipes (Cresson). 



°I. mesocentrus (Gravenhorst). Ephialtes rex (Kriech- 



baumer). 



°I. macer (Cresson). 



\ 



Megarhyssa Ashmead. 



Thalessa Holmgren. 



Key to Species. 



I. Wings without dark patches 2 



Wings with dark patches, otherwise transparent, tinted with 



