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



M. (Hypomicrogaster) zonarius Say. 



M. (Diolcogaster) brevicaudus Provancher. 



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

 Type locality: Stafford, 24 August, 1905, on flowers of 

 goldenrod (W. E. B.). 



M. (Microgaster) carinatus Packard. 



This is an American parasite of the cosmopolitan butterfly, 

 (Pyrantels) 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, 1 August, 1904, 24 May, 1905 

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



*M. (M.) gelechiae Riley. 



Parasitic on Gnorimoschema gallcesolidaginis. 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 



