DEVELOPMENT OF A HYMENOPTEROUS PARASITE SLD 
as the succeeding four. Wings hyaline, covered with short stout 
hairs. Venation piceous. Color of thorax deep bronze; abdo- 
men aeneous; the tarsi yellow-brown except the last joint which 
is black. 
The female is larger and of a more delicate structure than the 
male. The head is longer and narrower, the antennae are more 
slender and the abdomen is of different proportions. 
The type locality of the species is Forest Hills, Massachusetts. 
The following key, largely adapted from Ashmead,‘ will sepa- 
rate this from the other North American species: 
FEMALES 
em rte QEC RDN Ailes, Ce MEE Oe ce oo baw anys, 0c ed aos Se Ca AE 3 
SIRES RAI CUTE CNET Eon BAR ee nh Ie Nel ate aS Po Pees EL? 2 
2. Species bluish-green; tergum with a cupreous band at base, densely punc- 
mince wines nyaline, Slightly dusky... 5.22...) 6. 2 see. oe polita (Say) 
Species black, more or less bronzed; thorax rugoso-punctate; wings dusky 
SVRbIn RO WANS MECVUPCS ic) .00 acces ob. be ke we ewan vldh cela « aenea Prov. 
Shy LE ES) SUURAKETAINT EG | A AV Nia go de ear ary hy 4 
Head smooth the marginal vein two-thirds the length of the submarginal, 
TERS) Lh Tete a ae oO ee haematobiae Ashmead 
4. Whole prothorax with distinct punctures; wings hyaline, the marginal 
vein a little more than half the length of the submarginal............ 5 
Prothorax smooth, impunctured; wings hyaline, the marginal vein long 
eT ne REY ae tern t Pg ROE Aas ols avo) Suarcibve de a W's drosophilae Ashmead 
5. Mesonotum: smooth medioanteriorly, punctate behind, scutellum above 
the punctured line very definitely punctate®......rugosicollis Ashmead 
Mesonotum smooth mediolongitudinally; scutellum above the punctured 
line impunctate or with a few sparse punctures. .muscidarum Richardson 
Geographical distribution. The species of the genus Spalangia 
are widely distributed throughout North America and Europe. 
A number have also been recorded from Central and South 
America and the Hawaiian Islands. They appear to be absent 
from Australia, Asia and Africa, but this may be due to the lack 
of diligence in searching for them. 
4A synopsis of the Spalangiinae of North America. Proc. Ent. Soc. Wash., 
vol. 3, 1894, p. 35. 
5 Ashmead states in his description (loc. cit., p. 36) that the scutellum has 
‘“some sparse round punctures.’’ I have examined the type, however, and find 
the scutellum to be quite heavily punctured when compared with that of S. mus- 
cidarum. 
