No. 39] ODONATA OF CONNECTICUT: GOMPHIDAE 163 



metathorax pale, with a broad brown stripe including the meso- 

 pleural suture, and a narrow pale stripe above the suture ; mes- 

 epimeral shoulders dark, and metapleural suture lined with dark ; 

 legs black, coxae pale, the front femora greenish beneath, wings 

 clear. 



Abdomen : black or dark brown terga with a mid-dorsal streak 

 wider on i and 2 and reduced to basal triangles on 7 and 8; 9 

 with a broad mid-dorsal band of yellow sometimes reduced to a 

 small basal spot; 10 with a small spot or none; sides of terga i 

 and 2 and base of 3 yellow, a conspicuous yellow spot on cephalo- 

 lateral angles of 8, and broad yellow spot occupying the entire 

 lateral margin of 9; anal appendages as in Fig. 23, Nos. 13, 15; 

 accessories as in Fig. 21, No. 17. 



Female. — No yellow dorsal spot present on the base of segment 

 9, the lateral spot on this as long as the segment ; lateral margins 

 of all abdominal terga broadly marked with yellow ; vulvar lamina 

 (Fig. 20, No. 18) about one-third as long as segment 9, the two 

 plates together about as long as broad, tips separated. 



Measurements : total length, male 46, female 46 mm. ; length 

 of abdomen, male 32, female 32-36 mm. ; length of hind wings, 

 male 28, female 27 mm. ; width of hind wings, male 9, female 

 8.5 mm. 



Described from specimens in collection of P. P. Calvert, Phila- 

 delphia. Specimens also examined in the Cambridge Museum of 

 Comparative Zoology. 



Gomphus fraternus (Say) 



Journal of the Academy of Natural Sciences of Philadelphia, 8:16: 1839. 



Nymph. — According to Needham, the nymph of this species 

 has strong tibial burrowing hooks, which are as long as the tibiae 

 are wide ; third segment of antennae twice as long as the first and 

 second together. Mentum of labium squarish, in front of the 

 contracted basal or proximal fourth ; distal margin densely fringed, 

 slightly convex; palpi bluntly angular with 7- 11 small teeth on 

 the inner margins. 



Abdomen: with sides parallel most of its length, abruptly nar- 

 rowed beyond the sixth segment, and with minute dorsal hooks on 

 segments 8 and 9 ; median groove present in anterior segments ; 

 well-developed lateral spines on segments 6-9, those of 9 about 

 equaling the appendages. 



Measurements: length, 31 mm.; length of abdomen, 20, width, 

 9 mm. ; length of hind femur, 6.5 mm. 



Description from Needham, 1901 : p. 451. 



Adult, male. — Color yellow and black or dark brown. 



Head : face pale including labrum, clypeus and front, except a 

 dorsal transverse line in front of ocelli, which is black; ocellar 

 area black, occiput pale ; postgenae black, pale at sides. 



