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TOXOEEHINUS.— OETHOGNATHUS. 171 



An insect easily recognizable by its narrow form, the very long and slender rostrum, 

 the long legs and antenna;, and the slender, elongate, X-shaped, white mark common 

 to the prothorax and elytra, the prothorax along the sides and at the lower part of the 



flanks, and the metathoracic episterna, also albo-lineate. 



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Group SIPALINA. 



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Sipalides, Lacordaire (part.). 



Calandridce subfam. Rhinida, Leconte. 



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Under this group are included the Calandrids with the pygidium covered by the 

 ra. The African Sclerocardiides have a 7-jointed funiculus, and also differ in other 

 respects from the Sipalides of Lacordaire, and they will probably have to be assigned 

 a different position. 



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Sect. Orthognathides. 



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Orthognat hides, Lacordaire. 





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ORTHOGNATHIA. 



Orthognathus , Schonherr, Gen. Cure. iv. p. 812 (1838) ; Lacordaire, Gen. Col. vii. p. 311. 

 Sphanognathus, Sehonherr, op. cit. viii. 2, p. 215. 



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This genus was based upon a remarkable insect from Brazil. Mesocordylus sub- 

 parallelus, Chevr., also belongs to it, differing from the type, 0. lividus, in the armature 



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of the inner apical angle of the tibiae. The sexual distinctions are feebly developed 



in both of them. 











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1. Orthognathus subparallelus. (Tab. VIII. figg. 12, 12 a, b, 6 .) 



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Mesocordylus subparallelus, Chevr. Bull. Soc. Ent. Fr. 1880, p. exxiv 





Calandra crenatosulcata, Sturm, in litt. 



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S . Rostrum interruptedly bisulcate above ; tibiae fringed with long hairs within. 



$ . Eostrum smoother and narrower, the sulci shallower or almost obsolete ; tibiae more sparsely ciliate 

 within. 



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Length 6^-15. breadth 2|-6 millim. 





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Hab. Mexico (ex coll. Sturm 2 , Mus. Brit.), Refugio in Durango (Edge), Toxpam 



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(Salle 1 ); Guatemala (Salle), Cacao near Trece Aguas (U.S. Nat. Mus.), Paraiso 





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(Champion), Coban (Conradt) ; Nicaragua, Chontales (Janson) ; Costa Rica (Mus. Brit.), 



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San Jose (Biolley); Panama, Volcan de Chiriqui (Champion). 



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The twenty-five specimens of this insect before me vary enormously in size. It differs 

 from the S.-American 0. lividus, Gyll., in having the anterior tibiee unemarginate at 

 the tip, and all of them armed with an acute, rather broad, obliquely truncated, claw 

 at the inner apical angle, the basal joint, too, of the posterior tarsi is less dilated. The 



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rior tibia? (fig. 12 b *) are much widened towards the apex. The first ventral 









* The outer face of the tibiae is shown. 



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