1 82 CONNECTICUT GEOL. AND NAT. HIST. SURVEY [Bull. 



Cephalic margin of the first lateral stripe not at all rectangularly 

 sinuate; superior carina of the superior appendages not denticu- 

 late verticalis 



8. First abdominal segment with a spinulose ventral tubercle ; dorsum 



of segment lo with a median and submedian tubercle; superior 



appendages each with a superior apical carina mutata 



First abdominal segment without a ventral spinulose tubercle; 

 superior appendages without a superior apical carina, but with 

 an anteapical internal tubercle and inferior spine 9 



9. Lateral thoracic bands i mm. wide, and surrounded by a dark 



brown or blackish margin; two large basal spots on venter of 



abdominal segments 4, 5 and 6 umbrosa 



Lateral thoracic bands broader and not margined with dark brown 

 or black; venter of abdominal segments 4, 5 and 6 without pale 

 spots constricta 



Females 



1. Abdominal segment i with a distinct ventral tubercle mutata 



Abdominal segment i without a tubercle at base _. • 2 



2. Basal plate of ovipositor bilobed; lateral genital plates absent, .juncea 

 Basal plate of ovipositor not bilobed, its hind margin straight or 



slightly arcuate ; lateral genital plates present 3 



3. Styli shorter than the dorsum of segment 10; anal appendages less 



than 1.5 mm. broad, with apices rounded 4 



Styli as long as the dorsum of segment lo; anal appendages 1.5 to 



2 mm. broad, apices acute 9 



4. A black line present on fronto-clypeal suture 5 



No black line present on fronto-clypeal suture 7 



5. Thoracic stripes of the mesepisterna absent .or represented by an 



ill-defined spot on each; lateral thoracic stripes i mm. or less, 



often divided into two spots interrupta 



Thoracic stripes of the mesepisterna distinct, complete, or the upper 

 end separated as a distinct spot ; lateral stripes more than i mm. 

 broad and not divided into two spots 6 



6. First lateral or mesepimeral stripe not bent forward at the upper 



end ; spots between lateral stripes not large eremita 



First lateral or mesepimeral stripe bent forward at the upper end; 

 spots between lateral stripes large and often united with the 

 bands clepsydra 



7. Lateral thoracic stripes not margined with black; genital valves 



2-2.6 mm. long, bearing a minute brush of hairs at their apices 8 

 Lateral thoracic stripes margined with black, genital valves 2.1-3 

 mm. long, their apices without a minute brush of hairs umbrosa 



8. Metepimeral stripe curved ventrad at the upper end; the genital 



valves not ending abruptly canadensis 



Metepimeral stripe not curved ventrad at the upper end; groove 

 of the genital valves ending abruptly some distance before the 

 apices umbrosa 



9. First lateral stripe with dorso-cephalic margin straight, the stripe 



not usually giving off a posterior offshoot ; genital valves 3- 

 3.5 mm. long, their apices with a minute brush of hairs tuberculifera 

 First lateral stripe with the dorso-cephalic margin distinctly sinuate, 

 the upper end giving off a small posterior offshoot ; second lateral 

 or metepimeral stripe rapidly widened at the upper end ; _ genital 



valves 4-4.5 mm. long, their apices without a brush of hairs 



constricta 



