No. 22.] HYMENOPTERA OF CONNECTICUT. 277 



Cremastus Gravenhorst. 

 Key to Species. 



Male: head brown; face, orbits, clypeus, mandibles, and 

 palpi, yellow; middle of face clouded with fulvous; anten- 

 nas black, scape beneath dull reddish; thorax dull yellowish 

 brown; lobes of mesothorax darker medially, prothorax 

 yellow, scutel dark yellov^rish; propodeum black; meta- 

 pleurse shading into brown; tegulae yellow; wings hyaline, 

 veins fuscous; legs yeliowish varied with brown, especially 

 hind pair; tips of hind tibiae blackish; > abdomen with its 

 first and second dorsal segments as well as corresponding 

 ventral segments, yellow, the remaining segments reddish, 

 with a black spot at base above retiniae 



Female: length 6-7 mm.; black; clypeus, mandibles, palpi, 

 maxillae, and upper two-thirds of orbits, yellow; antennae 

 piceous, yellowish brown beneath near their bases; hind 

 margins of dorsal abdominal segments behind second 

 sometimes brownish; venter yellowish; exserted portion 

 of ovipositor two-thirds as long as abdomen; fore and 

 mid legs, including coxae, light yellow with dusky tarsi; 

 hind legs dull yellowish red, with coxae, except at tips, 

 and basal portion of trochanters, black; tarsi dusky; tegu- 

 lae and veins at base of wings whitish yellow, i>est of veins 

 and stigma, except a whitish spot at base of latter, pale 

 brown cooki 



°C. retiniae Cresson. Temelucha retinicB Ashmead. 

 Parasitic on the tortricid known as the pitch-pine Retinia 

 (Retinia rigidana), inhabiting the terminal shoots of the pitch 

 pine {Pinus rigida) , 



°C. cooki Weed. Temelucha cookii Ashmead. 

 Parasitic on the strawberry leaf -roller (Ancylis comptana). 

 Its host is common in Connecticut. 



Mesochorus Gravenhorst. 



Key to Species, 



1. Thorax almost entirely or entirely black; vertex and 



occiput black; orbits yellowish 2 



Thorax not colored as in preceding category 3 



2. Front below antennae bright yellow, with a slight reddish 



tinge down its middle; palpi stramineous; antennae brown, 

 pale yellowish at base; second antennal joint pale brown 

 above, third yellow, fourth and fifth pale yellowish brown; 

 tegulae and base of wings greenish yellow, wings otherwise 



