712 FROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvn. 



some of which, relating to the South American fauna, I haA^e no 

 knowledge of. 1 therefore present herewith a ligure of the abdominal 

 appendages (tig. 5) and of the accessory genitalia of the second abdom- 

 inal segment (tig. 6) of the male, and trust that these will render certain 

 the identit}' of this species later when Brazilian Micrathyrias shall come 

 to be studied. 



TRAMEA EURYALE Selys ? 

 Plate XL, %. 4. 



In the Fairchild collection from Java are a number of n3"mphs 

 belonging to a species of Tramea^ here doubtfully referred to euryale; 

 two other species of Trmnea, T. hiinneisttr! f\.n(\. T. ehlnensis, are known 

 from the East Indies. 



The apparently' full grown nymph measures in total length 22 mm., 

 abdomen 1.5 mm., hind femur T mm., width of head T mm., of abdo- 

 men 8.5 mm. 



Body and head of the usual form (Plate XL, fig. 4). Antenna longer 

 than the head; the relatiye length of the segments from the base out- 

 ward in the ratio: 1 : 1.1 : 2.5 : 2 : 2.3 : 2.4 : 2.6. Labium ample, with 

 about eleyen mental sette each side, the seven outermost in a close set 

 series of which the fourth or fifth is longest; lateral seta3 10, the basal 

 one smaller than the others. Teeth about 11 in number, low, serrate, 

 each armed with four or five spinules at tip. 



Lateral spines on abdominal segments 8 and 9 incurvate, exteriorly 

 spinulose, slightly longer on 0, almost reaching the level of the tips 

 of the inferior appendages. Superior appendage three-fourths as 

 long as the inferiors, and slightly longer than the laterals. The 

 inferiors strongly spinous on their margins. 



PANTALA FLAVESCENS Fabricius. 



Plate XL, tig. 5. 



Side by side with the uA'mph of Tramea just described I place the 

 nymph of the cosmopolitan Pantalaflavescens, for the sake of showing 

 clearly the difierences between the two genera they represent. In 

 Pantala the teeth on the opposed edges of the lateral lobes of the 

 labium are separated by much deeper incisions of the margin and the 

 mid-dorsal terminal appendage is much longer than in Tramea. 



Subfainil>- LESTIIV^E). 



ARCHILESTES GRANDIS Rambur. 



Plate XLII, fig. 3. 



Folsom, California, July, 1885, and Hot Springs, Arizona, June 26, 

 1901; also Bright Angel, Arizona, July 12, Colorado Canyon, 3,500 

 feet. Nymphs apparently grown. 



