248 PHILIP p. CALVERT. 



% . Sup. app. sleuder, almost straight, widened in their apical half, a small in- 

 ferior tooth near base, apex rounded. Inf. app. less than half as long, apical 

 half bifid, appendage narrowed a little at level of base of bifurcation, branches 

 moderately divergent. Anal triangle of 1-2 cells; 4-6 postcubitals on front 

 wings. 



9 . A brownish yellow cloud around nodus ; front wings with 9-13 antecubitals. 



Abd. % 42-44, 9 40. H. w. % 34-36, 9 36. 



One male, Clementon, N. J., S. F. Gross (C). 

 New Jersey, Maryland, Virginia (T. R. Peale, C W. Johnson — 

 A. E. S., C, W. I.). 



N. B.^This was originally described as a distinct species from furciUata, Say, 

 the chief differences being that the latter had the % sup. app. curved inwards 

 and downwards, apex of inf. app. more widely emarginated, 7 {antilope 4) post- 

 cubitals on front wings; 9 wings unspotted 12-13 antecubitals on front wings 

 {antilope 9-10), abdomen of slightly different shape. As additional specimens 

 are examined, the diff'erences between the two forms become less and less. 



20. Aeschiia Fabricius. 



(Aeshna) Fabr., Syst. Efnt. p. 424, 1775. Karsch, Ent. Nach. xvii, p. 2S8, 1891. 



A. Male with anal triangle of 2 cells, 10 with 3 basal dorsal teeth, of which the 

 middle one is largest (the specific characters of the females have not yet been 

 determined). 



554. Ae.sclina Jiincea Linne, var. verticalis Hagen. 



Ae. V. Hagen, Syn. Neur. N. A., p. 122, 1861. 



Face green, frons above with a black T-spot, no black line on fronto-nasal suture. 

 Thorax dark brown, an antehumeral (wider above) and sometimes a short hu- 

 meral stripe, green ; two green or blue lateral bands. Abdomen dark brown, 

 marked with blue or green spots and lines; 10 with a blue spot each side of 

 dorsum. Membranule smoky. 



% . Abdomen constricted at 3. Sup. app. as long as 9 + 10, oblong, narrower 

 at base, margins entire, a superior longitudinal carina not denticulated, apex mod- 

 erately acute. Inf. app. half as long, triangular. 



9 . App. oblong, narrower at base, apex rounded. 



Abd. % . 50-53.5, 9 51-55. H. w. % 42-45.5, 9 45-46. 



Ridley Twp., Del. Co., Pa., Oct. 4-18, P. P. Calvert. 

 Nova Scotia to the District of Columbia, Illinois. 



N. B.^No constant differences are apparent between this insect and the cir- 

 curapolar Ae. juncea L., except that the latter has a black line on the fronto- 

 nasal suture, and perhaps a slightly longer pterostigma, and the apex of sup. 

 app. % not quite so acute. 



Aesclma clep.sydra Say. 



Ae. c. Say, Jour. Ac. Phila. viii, p. 12, 1839. Hagen, Neur. N. A., p. 122, 1861. 

 Ae. crenata Hagen, Stet. Ent. Zeit. xvii, p. 369. Ae. eremita Scudder, Proc. Bost. 

 Soc. N. H., X, p. 215, 1866.* 



* The evidence on which this synonymy is based will shortly be published 

 elsewhere. 



