No. 39] ODONATA OF CONNECTICUT: LIBELLULIDAE 247 



nodal cross-vein ; there is always more or less yellow color sur- 

 rounding this dash and there is sometimes a second dash between 

 Cu and A, but only half the length of the first mentioned ; hind 

 wings with an opaque dash between Sc and R -(- M from base to 

 the first cross-vein and a triangular-shaped area from Cu to the 

 caudal end of the membrane, the distal angle of the opaque area 

 extending to within i mm. of the triangle; antenodal cross-veins 

 14-16 in front, 11-13 in hind wing; postnodals 10-12 in front 

 wing and 11 in the hind. 



Abdomen : dorsum of terga 2-4 usually pollinose and sometimes 

 also the cephalo-lateral angles of 5 (faintly so in tenerals) ; the 

 first segment much darker in color, and the venter of segments 

 i-io brown; dorsum of terga 5-10 black in older individuals; 

 mid-dorsum black, and sides brown in younger specimens ; supe- 

 rior anal appendages of the usual form ; inferior broad, flattened, 

 the lateral margins convex, and the tip with two black teeth 

 projecting upwards. Accessory appendages consisting of incon- 

 spicuous cephalic lobes ; hamules with a broad basal lobe, and a 

 hook projecting ventrad from about the middle, the apical tooth 

 horizontal and bent laterad ; genital lobes about the size of the 

 basal lobe of the hamule and provided with long black setae (Fig. 

 63, No. 10). 



Female. — Color similar to the male, but terga 2-4 frequently 

 not at all pollinose, the abdomen being largely brown, with a mid- 

 dorsal black stripe from base to tip; lateral carinae (PI. xxii, a) 

 of segment 8 not projecting ventrad, though when viewed from 

 below, the sterna of 8 and 9 appear considerably depressed below 

 the margins of the terga; vulvar lamina consisting of two small 

 well-separated plates about .5 mm. wide by .25 mm. long, the 

 caudal margins convex (Fig. 63, No. 4). 



Measurements : total length, male 37-41, female 37 mm. ; length 

 of abdomen, male 23-24, female 22-23 ^^- 5 length of hind wings, 

 male 31-33, female 31-32 mm.; width of hind wings, male 9-10, 

 female lo-ii mm.; length of stigma, male 2.5-3.5, female 

 3.5-4 mm. _ 



The varieties Libellula e. cxiista and Lihelliila e. deplanata are 

 said to differ mainly in the amount of pollen, the thorax being 

 largely dark brown with greenish stripes on the lateral margins 

 of the episterna. The female of L. e. extista has the vulvar lamina 

 connected by a small plate on the meson. Accessory and anal 

 appendages are the same as L. e. julia. Deplanata has the brown 

 at the base of the hind wings divided. 



A male in the Yale collection, from Salem, Massachusetts, and 

 referred to L. e. exusta, has the brown color at the base of the 

 hind wings extending half way to nodus. The abdomen is pol- 

 linose except the last two or three segments, the pale stripes of 

 the mesepisterna are yellow, and the opaque spot of the hind wings 



