604 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Chrysis Linnaeus. 

 Key to Species. 



1. Apical margin of abdomen entire; abdomen green, blue, and 



purple, like thorax 2 



Apical margin of abdomen not entire 5 



2. Posterior corners of margin of third segment rounded, even, 



not produced 3 



Posterior corners of margin of third segment angulated, 

 produced; small series of submarginal pits at apex of 

 abdomen cobaltina 



3. An arched keel across face above basin verticalis 



No arched keel across face above basin 4 



4. Submarginal series of pits at apex of abdomen at bottom of 



a strong declivity pacifica 



Submarginal series of pits at apex of abdomen in a broad 

 shallow groove hilans 



5. Apical margin of abdomen with one notch; abdomen blue 



or green like thorax perpulchra 



Apical margin of abdomen with two or more notches 6 



6. Apical margin of abdomen with two notches — three teeth.. 7 

 Apical margin of abdomen with three notches — four teeth 8 



7. Postscutellum rounded behind, not produced doriae 



Postscutellum conical behind, produced parvula 



8. Lateral margin of third abdominal segment, seen from side, 



bisinuate; basin of face striate frey-gcssneri 



Lateral margin of third abdominal segment, seen from side, 

 not bisinuate 9 



9. Lateral margin of third abdominal segment, seen from side, 



straight or arched inwardly 10 



Lateral margin of third abdominal segment, seen from side, 



arcuate or sinuate just before outer apical teeth nortoni 



10. Median teeth farther from each other than from outer teeth 



nitidula 

 Median teeth not farther from each other than from outer 

 teeth caerulans 



C. (Chrysogona) verticalis Patton. 

 Length 4-6 mm. 



C. (Olochrysis) pacifica Say. 



Length 6-12 mm. 



C. (O.) hilaris Dahlbom. 

 Length 6 mm. 



°C. (O.) cobaltina Aaron. 

 Length 9 mm. 



