106 ENTOMOLOGICAL NEWS. [Mar., '18 



of deciduous trees. The following key includes all of the 

 North American species except basalis Say and li'alshii West- 

 wood. 



Table to the \ T earctic Species. 



1. Females 2 



Males 8 



2. Abdomen rufous or rufo-ferruginous, without spots 3 



Abdomen black, with pale lateral spots or bands 4 



3. Head and thorax mostly black ; prescutum V-shaped, longer than 



its anterior width ; orbital carina extending well above the top 



of eye abdoininalis Say. 



Body entirely rufo-ferruginous ; prescutum U-shaped, the anterior 

 width subequal with the length ; orbital carina terminating be- 

 fore the top of eye crythrogastra Ashmead. 



4. Flagellum white maculata Say. 



Flagellum black 5 



5. Posterior orbits and superior orbital area shining, practically impunc- 



tate ; antennae extending beyond the tegulae, hicoriae Rohwer. 



Posterior orbits and superior orbital area opaque with distinct 



puncture* ; antennae short not extending beyond the tegulae,.. 6 



6. Second antennal joint distinctly less than half as long as the 



third and shorter than the fourth ; prescutum V-shaped ; legs 



reddish proi'ancheri Cresson. 



Second antennal joint distinctly more than half as long as the 

 third and subequal with or longer than the fourth ; prescutum 

 U-shaped ; legs largely black 7 



7. Front with irregular raised lines, the area between the antennae 



and extending to the clypeus with well-defined raised lines; 

 prescutum depressed posteriorly so the transverse rugae of the 

 notauli are complete or nearly complete from notaulus to no- 

 taulus ; tergites three and four with nearly complete yellow 



bands canadcnsis Provancher. 



Front and face reticulate ; prescutum not depressed posteriorly, 

 the notauli complete ; tergites three and four with lateral spots, 



tibialis Say. 



8. Superior orbital area coarsely sculptured ; head sculptured above 



the supraorbital line ; legs reddish prnrancJierl Cresson. 



Superior orbital area and head above the supraorbital line smooth 

 practically without sculpture (the area behind the ocelli in 

 macnlata is sometimes somewhat sculptured) 9 



9. Second antennal joint distinctly shorter than the fourth; small 



ferruginous or rufo-piceous species 10 



Second antennal joint subequal with or longer than the fourth; 

 black species 1 1 



