202 CONNECTICUT GEOL, AND NAT. HIST. SURVEY. [BuU. 



°M. (Hypomicrogaster) zonarius Say. 



°M. (Diolcogaster) brevicaudus Provancher. 



*M. (D.) solidaginis Viereck (new species). 

 Type locality: Stafford, 24 August, 1905, on flower* of 

 goldenrod (W. E. B.). 



M. (Microgaster) carinatus Packard. 



This is an American parasite of the cosmopolitan butterfly, 

 (Pyrameis) Vanessa atalanta. 

 *M. (M.) brittoni Viereck (new species). 

 Type locality: Kent, 31 August, 1904 (W. E. B.). 

 *M. (M.) congregatiformis Viereck (new species). 

 Type locality: New Haven, i August, 1904, 24 May, 1905 

 (W. E. B., P. L. B.). 

 *M. (M.) gelechiae Riley. 



Parasitic on Gnorimoschema gallasolidaginis. New Haven, 

 27 July, 1904 (P. L. B.). 



°M. sp. 

 Parasitic upon (Pyrameis) Vanessa hunt era. ~- 



Microplitis Foerster. 

 Key to Species. 



1. Clypeus blackish or black 2 



Clypeus, antennae and mandibles reddish, palpi light yellow; 

 tegulae and legs (except tarsi and hind coxae, which are 

 fuscous) stramineous; anterior half of abdomen, except 

 dorsum of first segment, stramineous; wings hyaline, areo- 

 let subrhomboidal. Length 3.5 mm maturus 



2. First dorsal abdominal plate wider or at least not narrower 



at apex than at base 3 



First dorsal abdominal plate narrower at apex than at base, 

 and at least three times as long down the middle as wide 

 at apex 7 



3. First dorsal abdominal plate a little longer down the middle 



than wide at apex, but always less than twice as long; 

 propodeum with a distinct median longitudinal carina ... 4 

 First dorsal abdominal plate at least twice as long down the 

 middle as wide at apex, parallel-sided, and black; antennae, 

 mandibles and labrum reddish brown; palpi, legs, and 

 more or less of under side of abdomen, together with a 

 portion of the margins of first and second dorsal abdom- 

 inal segments, reddish; claws blackish; tegulae reddish to 



