THE CANADIAN ENTOMOLOGIST. 321 



A STUDY OF THE GENUS MENISCUS. 



BY G. C. DAVIS, AGRICULTURAL COLLEGE, MICH. 



Synopsis of species.^ 



Abdomen entirely black or with white margins of segments. 

 Femora rufous or honey yellow. 



Antennae with yellowish annulus BetJnmei, Cr. 



Antennae without yellowish annulus. 

 Areolet present. 



Abdominal segments without white margins. 



Pleurte more or less rufous, yellow spots before and 



beneath teguhe saitellaris, Cr. 



Pleurae black, a yellow spot before and beneath tegulfe 



siiperbiis, Prov. 



Pleurae black, without spot before or beneath tegulte 



parva, Cr. 



Abdominal segments margined mth. v^h.\ie...pulcherrimus, Cr. 

 Areolet wanting. 



Mesothorax more or less rufous ostentator., n. sp. 



Mesothorax black and yellow rnirabilis, Cr. 



Femora black, areolet present . . S/ossonce, n. sp. 



Abdomen rufous, black at base. 



Areolet present, antennte without annulus. 



Posterior femora black with yellow markings elegans, Cr. 



Posterior femora rufous compius, n. sp. 



Areolet wanting, antennae with white annulus . . Michiganensis, n. sp. 



■Abdomen black, banded with yellow at base of segments 



Jo/msonii, n. sp. 



Meniscus ostentator, n. sp. 



$ . Length, 7 5 mm.; ovipositor, 7 mm. Black, polished ; with 

 orbital lines from occiput to middle of eyes in front, cheeks, clypeus, 

 mandibles except tip, palpi, gula, cuneiform lines on mesonotum, tegulae, 

 spot in front, lines beneath extending irregularly back to posterior coxae, 

 sides of scutellum, line on lower pleura? between anterior and middle 

 coxae, prosternum, anterior coxae, middle and posterior coxae except a 

 black dash above and large spot inside, all the trochanters except black 



* Meniscus Ashmeadii, Prov., and M. marginatus, Prov., belong to Piinpla 

 annulipes. 



