256 SERRICORNIA. 



PTEKOTARSUS. 



Pterotarsus, Eschscholtz, in Thon's Ent. Archiv (1829), ii. pt. 1, p. 33; de Bonvouloir, Mon. des 

 Eucnemides, p. 830. 

 This genus has been divided by de Bonvouloir into two subgenera — Pterotarsus 

 proper with the surface more or less irregular or tuberculate, and Lissothyreus with 

 even surface. Both are represented in the Central-American fauna. 



1. Pterotarsus humilis. 



Pterotarsus humilis, de Bonv. Mon. p. 837, t. 40. fig. 6 l . 



Hah. Nicaeagua (Salle 1 ), Chontales (Belt). — Guiana, Cayenne 1 . 



2. Pterotarsus eschscholtzi. 



Pterotarsus Eschscholtzii, Cast, in Silberm. Rev. Ent. iii. p. 175 x ; Guerin, Ann. Soc. Ent. Fr. 

 1843, p. 196, t. 6. fig. 71 2 ; de Bonv. Mon. p. 843, t. 41. fig. I 3 . 



Hah. Panama, Volcan de Chiriqui (Champion). — Brazil l 23 . 



3. Pterotarsus rugosus. 



Pterotarsus rugosus, Blanch. Voyage de d'Orbigny, Ins. p. 146, t. 8. fig. 3 1 ; Guerin, Ann. Soc. 

 Ent. Fr. 1843, p. 196 2 ; de Bonv. Mon. p. 845 3 . 



Hah. Panama, Bugaba, Volcan de Chiriqui (Champion). — Bolivia 1 2 3 . 



The carina of the last ventral segment is longer and more distinct in the male. 



4. Pterotarsus histrio. 



Pterotarsus histrio, Guerin, Icon. Regne Anim. t. 12. fig. 2 1 ; Latr. Ann. Soc. Ent. Fr. 1834, 



p. 132 2 ; Guerin, Ann. Soc. Ent. Fr. 1843, p. 194 3 ; Cast. Hist. Nat. Ins. Col. i. p. 227 4 . 

 Pterotarsus (Lissothyreus) histrio, de Bonv. Mon. p. 847, t. 41. fig. 3 5 . 

 Pterotarsus brasiliensis, Cast, in Silberm. Rev. Ent. iii. p. 174 6 . 

 Pterotarsus tuberculatum, Lucas, in Cast. Exped. dans FAmer. du Sud, iii. p. 69 7 . 



Hah. Guatemala, San Juan in Vera Paz (Champion) ; Nicaeagua, Chontales (Belt) ; 

 Panama, Volcan de Chiriqui (Champion). — Colombia, Bogota 5 ; Guiana, Cayenne 5 ; 

 Amazons 5 7 ; Beazil 123456 . 



An extremely variable species in its coloration. The ground-colour is a pale orange- 

 yellow, the head with a median black spot, the elytra with a broad black band at the 

 base, often interrupted at the suture, a band one third from the apex, also often 

 interrupted. This is the usual form, many departures from which are described 

 by de Bonvouloir. 



Var. inornatus. 



Colour entirely pale orange-yellow, without spots or bands ; basal joints of the antennae black, the rami of the 

 following joints piceous. 



Hah. Nicaeagua, Chontales (Belt). 



