no. 2080. NOTES ON NEOTROPICAL DRAGONFLIES— WILLIAMSON. 631 



Prothorax. — Male and female. Dark shining green above, pale 

 flesh below; hind lobe low, convex. 



Thorax. — Male and female. Above dark shining green, entirely 

 covering the mesepisternum and mesepimeron and the upper end of 

 the metepisternum ; below this and beneath pale flesh. 



Abdomen. — Male. Above black, 4-6 with very narrow pale basal 

 rings; apical articulations on 7-9 narrowly yellowish; sides below 

 shading out to pale dull yellow of the under color; lateral pale area 

 widest on 8-9 ; appendages very dark brown, extreme apex black. 



Female similar to male but the dorsum more metallic and on the 

 basal segments especially with greenish reflections; dorsal color nar- 

 rower, so the sides are more extensively pale; very narrow basal 

 rings on 2-7; pale apical articulations on 7-8 only. Genital valves 

 not reaching the apex of 10, the short palpi, with a knobbed or 

 swollen base, slightly exceeding 10; appendages conical, slightly 

 shorter than 10. 



Legs. — Male and female. Pale flesh, extreme apex of femora, 

 tibiae and tarsi black. 



Wings clear with milky reflections in one female; stigma brown, 

 darker in the male. 



Described from a male and a female, pairing, from Potaro Land- 

 ing, British Guiana, February 10, 1912, in my collection; and 1 

 female, Tumatumari, British Guiana, February 8, 1912. The male 

 from Potaro Landing is the type. The specific name is an allusion 

 to the superficial resemblance to species of the genus NeJialennia. 



Paratype. — Cat. No. 19218, U.S.N.M. A female specimen from 

 Tumatumari, British Guiana, February 8, 1912. 



In the tabulation of characters the following material has been 

 studied, each wing meaning one front and hind wing: 



Protonewm calverti, 16 male wings, 9 female wings; P. corculum, 

 8 male wings, 2 female wings; P. amatoria, 23 male wings, 2 female 

 wings; P. aurantiaca, 10 male wings, 2 female wings; P. cam, 6 

 male wings; P. cupida, 4 male wings; P. capillaris, 1 male wing and 

 drawing by Doctor Calvert of basal parts of another; Epipleoneura 

 fuscaenea, 8 male wings; E. incusa, 8 male wings; E. lamina, 

 20 male wings, 2 female wings; Psaironeura remissa, 23 male wings, 

 2 female wings; P. cerasina, 2 male wings; Epipotoneura neJialennia, 

 4 male wings, 2 female wings. Of this material one hind wing of 

 corculum and one front wing of cava were damaged and certain parts 

 lost. In tabulating characters the sexes were kept separate, but, 

 as sexual differences were not apparent, the data were combined in 

 the following table. 



