No. 22.] HYMENOPTERA OF CONNECTICUT. 6l 



Body color in general black; area between posterior ocelli 

 divided by a deep angular furrow; ocellar furrow distinct; 

 ocellar basin deep with heavy walls and almost straight, 

 the furrow extending around anterior ocellus with the 

 sides angular and sharplj' defined; antennae with segments 

 broad, segments three to five subequal in length; saw- 

 guides with the upper margin straight and the lower margin 

 convexly sloping to a point at apex above; body black, with 

 the following parts white: antennal segments six to nine, 

 labrum, trochanters, anterior and middle tibiae, base of 

 posterior tibiae, and tarsi. Length 14-16 mm. tarsatus 



M. semicornis (Say). Connecticut (E. N.). 

 °M. versicolor (Norton). Larva feeds on Cortms. 

 °M. testaceus Norton. 



*M. varianus (Norton). Howard, Insect Book, PI. xiii, 

 Fig. 10. Larva feeds on Cornus. Farmington (E .N.). 



M. tarsatus (Say). Howard, Insect Book, PI. xiii, Fig. 6. 

 Larva feeds on Cornus. Connecticut (E. N.). 



Strongylogastroidea Ashmead. 



Key to Species. 



1. Antennae in part pale 2 



Antennae entirely black g 



2. Antennae pale at apex and frequently also at base 3 



Antennae pale at base only 8 



3. Head in great part pale 4 



Head in great part black 7 



4. Posterior femora black; antennae black at base; body black, 



with the following parts white: clypeus, labrum, four apical 

 segments of antennae, tegulae, a very narrow line on collar, 

 posterior coxae in great part, trochanters, and scutellum; 

 with the following parts rufous: head with the exception 

 of ocellar and postocellar areas and lower half of antennal 

 furrow, prothorax at sides, median lobe of mesonotum, an 

 irregular spot on mesopleurae, abdomen except saw-guides, 

 front and middle legs beyond middle of femora, and poste- 

 rior tibiae and tarsi; anterior ocellus situated in front of a 

 distinct angular diverging ridge; saw-guides with the upper 

 margin straight, the lower margin semi-straight, rounded, 

 and obliquely truncate and pointed at apex. Length 11 mm. 



spiculata 

 Posterior femora rufous, at most only with a ring at apex; 

 antennae usually rufous at base 5 



