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



head and thorax; scape yellowish beneath; face below antennae 

 and a narrow band around eyes (sometimes obsolete above) 

 gamboge yellow ; eyes dark brown or black in death ; thorax 

 darker above than below ; mesonotum with three broad, darker, 

 longitudinal bands which vary in intensity; propodeum varying 

 in color ; legs, especially tibiae and tarsi, lighter in color than the 

 thorax; fore trochanters sometimes quite yellow; wings dark 

 fuliginous with bronze reflection; abdomen mostly concolorous 

 with the thorax. 



Parasitic on species of Datana. 



Therion Curtis. 



Exochilum Wesmael. 



Key to Species. 



i. Length 25 mm., or a little longer or shorter 2 



Length much less than 25 mm 4 



2. Color differing from Heteropelma Havicome practically only 



as follows: mid legs partly dark brown; hind legs with 

 basal two-thirds of tibiae yellow, apical third blackish; their 

 tarsi with first and second joints almost entirely con- 

 colorous with the pale color of their tibiae; remaining tarsal 

 joints brown; legs may be more varied with yellowish 

 brown and abdomen with brown; exserted portion of ovi- 

 positor not quite as long as thorax morio 



Not as in morio 3 



3. Black, with reddish marks; wings smoky yellow; antennae 



mostly reddish; legs mostly yellowish; coxae and apical 



half of hind femora and tibiae black fuscipenne 



Black; tarsi in part reddish; wings black, semiopaque, stigma 

 dark; antennae mostly yellow tenuipes 



4. Length less than 19 mm 5 



Length 19 mm.; head mostly brownish red except face and 



cheeks, which are mostly yellowish; thorax, except 

 blackish sutures, mostly brownish red; wings, antennae, 

 and legs much the same in color as in fuscipenne. . nigrovarium 



5. Length 14 mm.; otherwise agreeing with description of nigro- 



varium given above, except as follows: thorax mostly black, 

 sides thereof partly reddish, greater part of hind fem- 

 ora, and apical third of their tibiae black or blackish; 

 exserted portion of ovipositor nearly as long as first joint 



of hind tarsi sassacus 



Length 13 mm. (male); otherwise much as in above descrip- 

 tion of sassacus, from which it differs as follows: reddish, 

 with the following parts more or less black: front, vertex, 

 sutures of thorax, hind coxae, lower half and extreme upper 



