no. 2089. NOTES ON NEOTROPICAL DRAGON FLIES— WILLIAMSON. 623 



Of the four species, paucinervis Selys, exigua Selys, corculum Cal- 

 vert, and calverti, both sexes are known. The first two species, from 

 Brazil, are known to me only from descriptions. Paucinervis is, to 

 judge by color, closely related to corculum, but it remains to be seen 

 whether its venational characters are those of corculum or calverti. 

 Venationally the same is to be said of exigua, in which the thoracic 

 pattern (little black and similar in the two sexes) and the shorter 

 inferior appendages of the male suggest an altogether different rela- 

 tionship. Specifically the 4 may be separated as follows: 



Male. — Dorsum of thorax largely black, with large, isolated, trangular red spots on 



lower half calverti. 



Dorsum of thorax largely yellow or red. 



This red or yellow isolated on dorsum corculum. 



This red or yellow continuous with pale lateral areas. 



Mesepimeron with black paucinervis. 



Mesepimeron without black exigua. 



Female. — Thorax largely orange exigua. 



Dorsum of thorax largely black. 



Metepimeron with black markings calverti. 



Metepimeron without black. 



Metepisternum with some black above corculum. 



Metepisternum without black above paucinervis. 



PROTONEURA CORCULUM Calvert. 



Morales, Guatemala, May 27, 1909, 3 males. This is the second 

 record for this species, the original material, 2 males, 1 female, 

 having been taken at Livingston, Guatemala. The pale dorsal 

 thoracic color is red, not pale blue as described. For a discussion of 

 relationships, see under P. calverti. 



PROTONEURA AMATORIA Calvert. 



Morales, Guatemala, May 27, 1909, 1 male; Los Amates, June 21, 

 1909, 5 males, 2 females. 



Costa Rica: Rio Tizate, south of Turrucares, December 22 and 23, 

 1909, Calvert and Tristan, 21 males. A pair of the specimens from 

 Los Amates is deposited in the United States National Museum. 



Trinidad: Diegomartin River, near Port of Spain, February 29, 

 1912, 2 males, 1 female. Diegomartin is a small stream, at low-water 

 stage with much of its bed dry. Like other hill streams about Port 

 of Spain, it is very easy to follow the stream's bed, as the water is 

 generally shallow and the bottom hard. Clumps of bamboo grow on 

 the immediate banks at many places along Diegomartin, and below 

 the mass of tough fibrous roots which form a vertical bank are fre- 

 quently pools of deeper water. Amatoria was taken in the shadow of 

 these masses of bamboo roots. Its capture in Trinidad, far from 

 where I collected the types in Honduras, was indeed a surprise. 



