EURYSTEENUS. 41 



metasternum being unarmed between the hind coxae, instead of having a compressed 

 and acute tubercle. Dalman says u Sterno inter pedes anticos in spinam producto," 

 but anticos is evidently here a slip for posticos. 



5. Eurysternus mexicanus. 



Eurysternus mexicanus, Harold, Ann. Soc. Ent. Er. 1869, p. 505 1 ; Stett. ent. Zeit. 1880, p. 14 2 . 

 Eab. Mexico \ Cordova {Salle, Edge), Playa Vicente, Cosamaloapam, Santecomapan 

 (Salle), Misantla, Jalapa, Tampico (Edge) ; Guatemala, Panzos, San Joaquin in Vera 

 Paz (Champion) ; Nicaragua, Chontales (Belt, Janson) ; Panama, Bugaba, David, San 

 Feliz (Champion). — South America, Colombia 2 . 



In this species the lateral carina is formed by an extension of the humeral carina, 

 which behind reaches the apical callus and conceals (viewed from above) the epipleural 

 carina. 



6. Eurysternus plebejus. 



Eurysternus plebejus, Harold, Stett. ent. Zeit 1880, p. 14 1 . 



Eab. Nicaragua, Chontales (Janson) ; Panama, Bugaba, David (Champion). — South 

 America, Colombia l , Ecuador, Amazons. 



Agrees with E. mexicanus in the nature of the lateral carinse of the elytra ; but the 

 epipleural carina is rather more strongly curved upwards, and approximated to the 

 more obtuse inner carina — a peculiarity pointed out by Von Harold, though he does 

 not compare the structure with that of E. mexicanus. The species is much smaller 

 than E. mexicanus, and differs in the hind femora not showing the remarkable dilatation 

 and compression of that species. 



Von Harold describes the female only. The metasternum is similar in both sexes, 

 having a round central fovea, with an obtuse carina thence to the apex ; but the hind 

 femora present a singular sexual peculiarity in having a strong spine beneath in the 

 female, and being unarmed in the male. The hind tibia? ( 6 ) are not greatly prolonged 

 on the inner side at the apex as in other species, but are spurless. 



7. Eurysternus angustulus. (Tab. II. fig. 19.) 



Eurysternus angustulus, Harold, Ann. Soc. Ent. Er. 1869, p. 506 1 . 

 Eab. Mexico (Salle v ). 



One example only, a male labelled " typus " in Von Harold's handwriting in the 

 Salle collection. The species is allied to E. impressicollis, Casteln., from Colombia ; 

 in both the thorax is very uneven, and the hind tibiae in the male prolonged at the 

 apex into a long and sharp spine, simulating a spur. The spine is very much longer 

 and more spur-like in the Colombian species. 



biol. centk.-amer., Coleopt., Vol. II. Pt. 2, May 1887. GG 



