Collection of Odonnta from Panama. 367 



markings, whicli become flavcscent towards the outer edges ; 

 these last are bhick. 



" Tergites 8-9 somewhat rufesccnt. Median line black." 



There are seven males and one female in the collection, and 

 although one of the males bears the no. 5, the above descrip- 

 tion was probably taken from the female, to which it seems 

 to be much more applicable. 



Lepthemis verbenata, Hugcn, is usually considered to be a 

 mere synonym of Mesothemis affala, Selys ; but, as far as I 

 can tell without actually examining Hagen's types, the species 

 sent by ]\lr. Dolby-Tyler is the true verbenata and has every 

 appearance of a Lepthemis, especially as Hagen understood 

 that genus in 1861. It has all the most important structural 

 characters of M. attala, which it much resembles, but the 

 abdomen is much longer and more slender, segments 4-7, 

 though slightly decreasing in length, being about four times 

 as long as broad, whereas they are less than twice as long as 

 broad in M. attala. The cross-nervures are also less by one 

 or two in verbenata, none of the specimens before me having 

 more than 14, and often only 13, antenodal cross-nervures on 

 the fore wings, while all our M. attala have 15. The female 

 corresponds fairly with Hngen's description of L. verbenata; 

 the males are the dark furm which he describes. The latter, 

 however, are not quite so dark as Hagen's description might 

 imply, for the base of the mandibles and the sides of the 

 labrura are testaceous, and the femora are lined with red. 



This is one of the most interesting species in the collection. 



I have just heard from Prof. Calvert that he also regards 

 the two species as distinct, 



Erythemis iieruviana. 

 Libelhda peruviana, Ramb. Jus, Nevr. p. 81 (1842). 



( (J , no. 2.) " Eyes bluish black. Ocelli, epicranium, 

 clypeus, and labrum black. 



" Dorsal aspect of mesepisterna and notuin dark blue, ap- 

 proaching black, this colour extending to the middle of the 

 third abdominal tergite. Apical half of third tergite, tergites 

 4-10, and cercopoda bright crimson." 



( ? , no. 15.) " Eyes greyish. Epicranium posteriorly dirty 

 white, bordered anteriorly with black. Clypeus and labrum 

 olivaceous. 



" Dorsal aspect of mese])isterna pale green, bordered late- 

 rally with fuscous. Notum pale green. 



" Tergum of abdomen pale green, bordered laterally with 

 fulvous, and this exteriorly with ochreous." 



Four males and two females in the collection. 



