PACHYLOPUS.—TRYPAN AUS. 227 
1. Pachylopus gaudens. 
Pachylopus gaudens, Lec. Ann. Lyc. N. York, v. p. 165"; Horn, Proc. Am. Phil. Soc. xii. p. 345 
(1873). 
Hab. Mexico, Tapachula in Chiapas (Hége) ; Guarema.a, Champerico (Champion). 
Three examples from the sea-coast, at Champerico, one measuring only 2 millim. ; 
many specimens from Tapachula. 
TRYPANAUS. 
Trypanaus, Eschscholtz, Zool. Atl. i. p. 10 (1829); Marseul, Monogr. in Ann. Soc. Ent. Fr. 
1856, p. 103. 
Tryponeus, Erichson, in Klug’s Jahrb. der Ins. 1834, p. 198. 
The Zrypanwi are very widely distributed, but are most numerous in the tropical 
regions of the New World; nearly seventy species have been described. None are 
found in Europe, nor is an African species known; one is found in Japan in lat. 44°. 
These insects feed upon various species of Platypus, and, according to Mr. Champion, 
are often to be found in abundance in the hottest sunshine crawling on the bark of 
infected trees. 
The sexual characters of the species are very curious. 
1. Trypaneus torpedo. (Tab. VI. fig. 13, 2 .) 
Tryponeus torpedo, Lewis, Ann. & Mag. Nat. Hist. 5th ser. xv. p. 469°. 
Hab. Nicaracua, Chontales (Belé'); Panama, Bugaba (Champion). 
There are six examples of this species from the State of Panama in the present 
collection; one of these is a male, the sex previously unknown. It differs from the 
same sex of 7. elongatus, Mars., in having the rostrum triangular, as in 7. noxius, 
Mars.; and in the thoracic tubercles being widely separated from each other. ‘This is 
the largest known species of the genus. 
2. Trypaneus quadrituberculatus. 
Trypaneus 4-tuberculatus, Mars. Monogr. in Ann. Soc. Ent. Fr. 1856, p. 120, t. 2. fig. 12*(¢). 
Trypaneus teres, Mars. loc. cit. p. 111, t. 2. fig. 3° (¢). 
Hab. Guaremata, Cerro Zunil, Las Mercedes (Champion); Panama, Bugaba (Cham- 
pion).—CoLomBIa ? ?. 
3. Trypaneus noxius. 
Trypaneus noxius, Mars. Monogy. in Ann. Soc. Ent. Fr. 1860, p. 838, t. 2, no. v. fig. 1’. 
Hab. Muxico, Cordova (Sailé1); Guarsmana, Las Mercedes, Chacoj (Champion) ; 
Panama, Bugaba, Volcan de Chiriqui (Champion). 
2 G* 2 
