G0N1UEUS— PLESTIA. 289 



former in its long slender points, and the latter in being much shorter. (See Tab. 

 LXXVI. fig. 2.) 



PLESTIA. 



Plestia, Mabille, Le Nat. x. p. 146, f. 1 (1888) ; Watson, P. Z. S. 1893, p. 21. 



This genus contains, so far as at present known, three species, whereof P. staudingeri 

 is the type, and one we describe below as new. All of them occur in Mexico or 

 Guatemala. 



The antennae are sickle-shaped, the club being gradually curved and ending in a fine 

 point. They thus differ from those of Eudamus, in which the antennae are abruptly 

 bent backwards near the tip. The third median segment of the primaries is very short, 

 and the recurrent nervure starts from its extremity ; the secondaries have a lobe-like 

 projection at the anal angle. The tibiae of all the legs are densely hairy. 



1. Plestia staudingeri. (Tab. LXXVI. figg. 3, 4 * .) 



Plestia staudingeri, Mabille, Le Nat. x. p. 146, f. 1 \ 



Alis brunneis : anticis macula in cellula, altera costali, tertia infra earn, serie submarginali (maculis infima et 

 mediana bifidis, tertia ad apicem singula), punctis tribus alteris costalibus ochraceo-byalinis, ciliis alterne 

 fuscis et ochraceo-albis ; posticis maculis irregularibus discalibus ochraceis, ciliis ut in anticis : subtus, 

 anticis maculis hyalinis ut supra, ad apicem ochraceo variegatis, area interna pallide ochracea ; posticis 

 fasciis tribus valde irregularibus et maculosis, una basali extrorsum ochraceo limbata, secunda per cellulam, 

 tertia discali extrorsum late ochraceo marginata ; palpis et pectore pallide ochraceis ; plica costali obvia. 



Hab. Guatemala l (von Turckheim, in mus. Standing er). 



Dr. Staudinger has kindly lent us the type of this distinct species, which was sent to 

 him by Herr von Tiirckheim probably from the neighbourhood of Coban in Vera Paz. 

 We never met with this species ourselves, though we have allied forms from Mexico 

 and Arizona mentioned below. 



2. Plestia elwesi, sp. n. (Tab. LXXVI. figg. 5, 6, 7 6 .) 



P. staudingeri similis, sed anticis maculis duabus alteris submarginalibus vena radiali inferiore utrinque positis ; 

 posticis maculis discalibus pallidioribus, cauda minus elongata : subtus fasciis nigris melius definitis, area 

 inter fasciam discalem et fasciam per cellulam fere omnino pallide ochracea, distinguenda. 



Hab. Mexico, Orizaba (H. J. Elwes). 



Mr. Elwes captured a single male specimen of this species at Orizaba in March 

 1888, from which our description is taken. The species is clearly closely allied to 

 P. staudingeri. 



The male genitalia are very similar to those of Eudamus simplicius ; the harpagones 

 have a rounded end, and there is a sharp spine turned backwards at the top of the 

 further edge of a deep dorsal fissure. (See Tab. LXXVI. fig. 7.) 



biol. centr.-amek., Rhopal., Vol. II., August 1893. 2 p 



