242 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 



O. bilobatus (Provancher). 

 O. abdominalis (Cresson). 



Pammegischia Provancher. 



Key to Species. 



1. Vertex not at all transversely wrinkled; medial mesothoracic 



lobe not emarginate anteriorly ' 2 



Vertex transversely wrinkled or reticulate 3 



2. Frontal crest distinct; vertex punctate, more especially below; 



second joint of antennae as long as third; thorax stained 

 with brown; legs brown and pallid; abdomen and head 



tawny. Length 4 mm lovei 



Frontal crest indistinct; vertex polished and almost impunc- 

 tate; second joint of antennae two-thirds as long as third; 

 reddish tawny all over except apex of propodeum, which 

 is brownish. Length 16.5 mm ouelleti 



3. Vertex transversely wrinkled, especially below, the wrinkles 



somewhat broken; occiput not distinctly wrinkled 4 



Vertex coarsely and deeply reticulate all over; occiput smooth 

 and polished; black; basal half of abdomen, except extreme 

 base of petiole, red; legs brown, tibiag and knees pale ashmeadi 



4. Body black and red; legs more or less yellow... 5 



Body tawny all over except sutures of thorax above, or 



entire thorax and vertex black. Length 10 mm burquei 



5. Legs, beyond coxae, and face, tawny. Length 5 mm pallipes 



Legs beyond coxae brown; fore tibiae and tarsi and hind tarsi 



tawny. Length 7.5 mm xiphydriae 



°P. lovei Ashmead. 

 °P. ouelleti Bradley. 

 °P. ashmeadi Bradley. 

 °P. burquei Provancher. 



Bred by Dr. A. D. Hopkins from dead branches of hard maple 

 infested by Xiphydria abdominalis (albicornis) . 



°P. pallipes Cresson. 



°P. xiphydriae Ashmead. 



Dr. J. C. Bradley thinks this must be the female of pallipes. 

 The species was bred from Xiphydria provancheri living in birch 

 twigs. 



TRIGONALID^. 



The habits of n»ne of the North American species belonging 

 to the family Trigonalidae are known, but the habits of some of 



