34 PHILIP p. CALVERT. 



vaire, mediocre, eraarginee ou fendue." In his list of species of 

 Cordulina, appended to the Second Additions, he indicates that he 

 has seen only the male Walsh'd. He has, therefore, probably placed 

 Walshii in that group for reasons based on the relations of the male 

 to the males of other species of Somatochlora. 



liibellula iiicesta Hagen. 



Miss Wadsworth has sent me three males and three females of 

 this species from Manchester, Kennebec Co., Maine, taken June 18, 

 19, 25, July 9, 16, 1889. The males agree with Dr. Hagen's de- 

 scription (Syn. of 1861, p. 155). The female has not been described. 

 A description of my specimens follows : 



9 . — Frous deeply grooved above, brown, ligliter on the sides. Nasus brown, 

 yellowish on sides. Ehinarium brown. L ibrura yellowish, brown at the middle 

 of the base. Labium, labial palpi yellowish. Vertex truncate at apex, dark 

 brown with a yellow spot above posteriorly. Occiput dark brown, with a divided 

 yellow spot behind. Rear of eyes dark brown, with two yellow spots. 



Anterior lobe of prothorax brown, with a median, dorsal yellow spot ; poste- 

 rior lobe yellowish, entire. 



Dorsum of thorax dark reddish brown, with a median yellow stripe. Sides 

 light yellow, dark brown at bases of wings and of feet, a short brownish line on 

 the second lateral suture. Pectus yellowish. 



Feet black ; trochanters and coxae yellowish, also the anterior femora inferiorly. 



Abdomen yellowish. Dorsum of 1 brownish. A dark brown median dorsal 

 stripe on 2-9. Dorsum of 10 obscure yellowish. A brown stripe on the sides of 

 1, 2, and the apical half of 3. Abdomen beneath obscure yellowish. 



Appendages longer than the 10th segment, simple, straight, apex acute. 



Vulvar lamina erect, but short; its outline, viewed directly from below, is 

 almost semicircular. 



Wings hyaline; a brownish basal streak on all the wings, between the sub- 

 costal and median nervules, hardly extending to the first antecubital ;■■■ the 

 nodus surrounded by a brownish tinge, and the apex edged with brownish. 

 Pterostigma very dark brown, surmounting parts of 5-6 cellules. Antecubitals, 

 16-17 on anteriors, 12-14 on posteriors. Postcubitals 11-13 on anteriors, 13-14 

 on posteriors ; 4. then 3 rows of discoidal areolets on anteriors ; 3, then 2 rows 

 ou posteriors. Discoidal triangle of anteriors usually crossed by two veins, of 

 posteriors crossed by one vein. Internal triangle of anteriors of 4 cellules, not 

 always formed in the same manner. No internal triangle on j)osteriors. One 

 hypertrigonal on anteriors, placed over the discoidal triangle. No hypertrigonals 

 on posteriors (a trace of one exists in one wing of one specimen). One basal 

 postcostal cross-vein, usually, but not always, placed nearer the base than the 

 first antecubital. 



Total length 50-51 mm. Abdomen 33-34 mm. Anterior wing 40 mm. Poste- 

 rior 39 mm. 



■■ In one of my three specimens the basal streak extends to the third ante- 

 cubital on the anteriors, to the second antecubital on posteriors. 



