No. 39] ODONATA OF CONNECTICUT I GOMPHIDAE 165 



Female. — Femora marked with pale on the sides (cephalic sur- 

 faces) ; abdomen with broad lateral stripes on margin of terga 

 1-5, obscurely so on 6-7, more distinct on 8 and 9; sej^ment lO 

 entirely black; vulvar lamina consisting (Fig. 20, No. 6) of two 

 short rounded lobes about one-sixth as long as segment 9. 



Measurements : total length, male 47-50, female 47-50 mm. ; 

 length of abdomen, male 33-36, female 33-36 mm. ; length of 

 hind wings, male 30, female 30-31 mm. ; width of hind wings, 

 male 8.5-9.5, female 9 mm. ; length of stigma, 3-4 mm. 



Described from material in the collection of P. P. Calvert. 



Gomphus vastus Walsh 



Proceedings of the Academy of Natural Sciences of Philadelphia, 391 : 

 1862. 



Nymph. — Labium with five to six teeth on the mesal margins 

 of the labial palpi; terminal fixed hook bent at right angles (PI. v, 



FiR- 13). 



Abdomen with lateral spines on segments 6 to 9 inclusive, those 

 on 9 as long as segment 10; dorsal projections on segments 8 

 and 9. 



Measurements : Total length, full-grown, 32 mm. ; length of 

 abdomen, 20 mm. ; hind femora, 5 mm. ; dimensions of segment 9, 

 9.2 mm. long by 4 mm. wide at cephalic margin. 



Adult, male. — Black and yellow. 



Head : pale, black as follows : a broad stripe on the f ronto- 

 clypeal suture, anteclypeus, ventral and dorsal margin of the 

 labrum, median spot on the labrum, most of the postgenae ; occiput 

 pale. 



Thorax: pronotum with 3 pale spots of similar size ; meso- and 

 metathorax as in Fig. 22, No. 7, the dorsal pale stripe of the mes- 

 episterna narrow, connected with the collar in front and sometimes 

 connected at the wing bases with the narrow lateral stripe ; mes- 

 epimeral shoulders black, the interpleural fold also lined with black 

 or dark pigment ; front femora pale beneath, wings clear. 



Abdomen : a dorsal pale line on terga 3-6 inclusive and some- 

 times a basal streak on 7, and broader bands on i and 2, sides of 

 I and 2, and basal half of 3, pale; a pale spot on cephalo-lateral 

 angles of 8, but a sub-triangular yellow spot on sides of terga 9 ; 

 terga 7-9 dilated ; anal appendages slender, the superiors without 

 conspicuous ventral teeth. 



Female. — Middle femora pale beneath ; vulvar lamina as in Fig. 

 20, No. 19, more than half as long as segment 9, narrowed at apex, 

 the tips of the plates in contact. 



Measurements: total length, male 51, female 55-56 mm.; length 

 of abdomen, male 40, female 37 mm. ; length of hind wings, male 

 30, female 32 mm. ; width of hind wings, male and female 9 mm. 



Described from specimens in the collection of P. P. Calvert, 

 Philadelphia. 



