298 THE CANADIA.N ENTOMOLOGIST. 



11. Base of metathorax with distinct, semilunar enclosure; punctures 



of mesothorax crowded anteriorly pacifictis, Ckll. 



Enclosure indistinct, punctures of mesothorax not 



crowded truncaius, Robt. 



12. Abdomen with Ixisal luiir jjatclics or bands ; si/c larger, 7^^-S mm. 13. 



Whol'j surliu c of abdomen covered with ])ubescence ; size smaller, 

 6-7 mm "...14. 



j^. Length, 7)2 mm.; segments 2 and 3 with only basal hair })atches ; 

 teeth of hind inner spur very oblique occulttis, Vach. 



Bands on basal segments complete ; teeth of hind inner spur not 

 oblique . Cookyi, n. sp. 



14. Facial quadrangle about square, apical margins of abdominal seg- 



ments testaceous Cordieyi^ n. sj^. 



Facial quadrangle longer than broad, apical margins of segments not 

 testaceous farius, Vach. 



15. Apical margins of segments not testaceous 16. 



Apical margins of segments more or less testaceous. .diat?'etus, Vach. 



16. Thorax almost impunctate Ttiusi, Cwfd. 



Thorax closely 4:)unctured trizonatus, Cress. 



17. Bands on apical margins of abdominal SQgxntni?, . . Frova7iche?'i, D. T. 

 No bands on apical margins of abdominal segments 18. 



18. Punctures of mesothorax coarse 19. 



Punctures of mesothorax line 2c. 



19. Truncation of metathorax surrounded by a salient rim; wings 



dusky Cressofiii, Robt. 



Truncation of metathorax not with a salient rim ; wings 



white aibipennts, Robt. 



20. Abdomen green, apical margins broadly testaceous. . . .zepkyi'us, Sm. 



Abdomen not green 21. 



27. Head and thorax blue, tinged green, abdomen black, not 



pubescent atrivetitris, n. sp. 



Head and thorax brassy-green, abdomen \i\\h^%Q.twi. .versatus, Robt. 



Males. 



I. Species without any green 2. 



Species with more or less green 14. 



