290 EHOPALOCERA. 



3. Plestia dorus. (Tab. LXXVI. figg. 8, 9 6 .) 



Eudamus dorus, W. H. Edwards, Papilio, ii. p. 140'. 

 Plestia dorus, Wats. P. Z. S. 1893, p. 21, t. 3. f. 4 2 . 



Alis anticis ut in P. staudingeri maculatis ; posticis maculis quatuor discalibus venis separatis semihyalims : 

 subtus anticis ad apicem et posticis omnino glauco atomatis, fascia basali nigra vix ulla, fascia discah 

 medialiter maculis hyalinis paginse superioris interrupta ; plica costali obvia. 

 2 mari similis, sed plica costali nulla. 



Hab. North America, Arizona 1 . — Mexico, Northern Sonora (Morrison). 



We have two males and a female of this species, all obtained by Morrison when 

 collecting along the northern frontier of our region. The same collector supplied 

 Mr. Edwards with the types of his description. The species was first placed in the 

 genus Eudamus, but we have no doubt it is strictly congeneric with Plestia staudingeri, 

 the type of which is before us. 



TARSOCTENUS. 



Tarsoctenus, Watson, P. Z. S. 1893, p. 21. 



The antennae in this genus resemble those of the members of Phocides, having a 

 moderate club and ending in a slender terminal hook. The palpi are densely scaled and 

 the terminal joint more prominent than in the allied genus. There is a costal fold to 

 the primaries, the cell of which is long, exceeding two-thirds of the costa ; the disco- 

 cellulars are only slightly oblique ; the third median segment is not much shorter 

 than the second segment ; the secondaries have a distinct anal lobe ; the discocellular 

 meets the median at the origin of its second branch, the subcostal branch starting before 

 the end of the cell ; the hind tibiae are very short and have only one pair of terminal 

 spurs in the male — one of these is very long, and on the underside of the proximal tarsal 

 joint on either side is a comb of curved reddish-orange bristles, which, when the tibia 

 and tarsus are extended in a line, enclose the long spur. (See Tab. LXXVI. fig. 13.) 



The genus contains about seven or eight species, all of them belonging to the Tropical 

 American fauna, the State of Panama being the extreme northern limit of its range, 

 three species occurring in that district. 



The coloration of the members of this genus is very diverse, all the species having a 

 colour-resemblance to some species of Pyrrhopyge or Phocides. 



a. Upperside black, with the body and base of the wings tawny yellow ; underside black. 



l. Tarsoctenus gaudialis. (Tab. LXXVI. figg. 10, 11, 12, 13 6 .) 



Ery tides gaudialis, Hew. Ent. Monthly Mag. xii. p. 250 \ 



E. corytas similis, sed alis ad basin magis fnlvescentibus, anticis fascia mediana angustiore, fascia ultra earn 

 bifida multo magis obvia punctisque qninque semihyalinis ad angulum apicalem, squamis paucis caerulek 

 ad marginem externum : subtus posticis maculis basalibus runs absentibus. 



Hab. Nicaragua, Chontales (Belt) ; Panama, Chiriqui (Bibbe *), Lion Hill (McLean- 

 nan), — Colombia. 



