132 CONNECTICUT GEOL. AND NAT. HIST, SURVEY [Bull. 



3. Postgenae with conspicuous horns (Fig. 14, No. 8) rupinsulensis 



Postgenae without conspicuous horns 4 



4. Wings flavescent ; length of abdomen 22 mm howei 



Wings clear ; length of abdomen 32-35 mm 5 



5. Black stripe present on the metapleural suture aspersus 



No black stripe present on the metapleural suture carolus 



Ophiogomphus aspersus Morse 



Psyche, 7: 209: 1895. 



Nymph. — Rudimentary dorsal hooks on abdominal segments 2 

 to 9, longest on 2; wing-pads extending to the middle of seg- 

 ment 4. 



Measurements: total length. 24 mm.; length of abdomen, 15 

 mm. ; greatest width of abdomen, 7 mm. 



Adult, male. — Color yellow or greenish and black. 



Head : yellow except the ocellar area and stripe on front, which 

 are dark. 



Thorax : pale with a narrow dark stripe on the mesopleural 

 suture and another a little above on the episternum, the latter not 

 reaching the wing bases, sometimes shoulders of mesepimera dark ; 

 metapleural suture dark ; middle and hind femora pale on cephalic 

 surfaces, darker at tips, and with short spines below not in rows ; 

 tibiae brown or sometimes black, lighter above, with double row 

 of spines beneath, and two spinigerous ridges above ; tarsi and 

 claws black ; wings clear, slightly smoky. 



Abdomen : with yellowish green dorsal marks, widened consid- 

 erably on terga 2-9 at the base but not reaching the apices of those 

 segments; segment 10 and the anal appendages brown, 10 some- 

 times with a lanceolate yellow dorsal spot nearly as long as the 

 segment ; terga 8 and 9 with large lateral spots on each, the mar- 

 gins of 3-7 streaked with yellow ; sides of i and 2 also pale ; 

 superior anal appendages (Fig. 14, Nos. 3 and 9) denticulate 

 beneath ; the inferiors bifurcate, each arm being narrow at tip, 

 and blunt, not broadened. Accessory appendages are shown in 

 Fig. 14, No. II. 



Female. — Vulvar lamina two-thirds as long as 9, bifid for a 

 little more than half its length ; occipital horns slender, brown ; 

 occipital spines present in contact or very near the compound eyes. 



Measurements : total length, male 45-49, female 44 mm. ; length 

 of abdomen, male 32-35, female 30-32 mm. ; length of hind wings, 

 male 26-28, female 26-27 mm. ; width of hind wings, male 8-8.5, 

 female 8 mm. 



Described from a male taken at Saranac, N. Y., July 27, 1900, 

 by L. W. Sweet, sent to the writer by Mr, C. W. Johnson ; notes 

 on additional material in collection of Dr, Calvert, 



New England,— May 26-August 29, 



