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RHYNCROPHOEA. 



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to Hexarthrum that it must be placed near it. Dryotribus mimeticus, Horn { — Tha. 



lattodora insignis, Perkins), from Key West, Florida, &c., has been introduced into the 

 Hawaiian Is., and it occurs also in Mustique Island, one of the Grenadines. This 

 insect somewhat resembles Dryophthorus and Cheer orrhinus, but has the eyes placed 



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on the rostrum, as in Dioptrophorus, Ithaura, and Theognete, genera placed near 

 Anchonus in this work*. In all the Pentarthrides the metathoracic episterna are 

 almost or quite covered by the inflexed margin of the elytra, as in Dryophthorus. 



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PENTARTHRUM. 



Pentarthrum, Wollaston, Ann. Nat. Hist. (2) xiv. p. 129 (1854) ; Trans. Ent. Soc. Lond. (2) v. 



p. 397 (1861) ; ibid. 1873, pp. 434, 446, 513, 598; Lacordaire, Gen. Col. vii. p. 324. 



A widely distributed genus, the type of which is the European P. huttoni, Woll. 

 The only Central-American species that can be satisfactorily referred to it is P. cylin- 

 dricum, Woll., originally described from introduced examples found in the Island of 

 Ascension. In this latter insect the anterior coxae are more approximate, and the 

 tarsi more slender than in P. huttoni. Pentarthrum appears to be especially well 

 represented in New Zealand, but some of the forms from that country will certainly 



have to be eliminated. 



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1. Pentarthrum cylindricum. (Tab. I. fig 12.) 



Pentarthrum cylindricum, Woll. Trans. Ent. Soc. Lond. (2) v. p. 398, t. 19. figg. 5, 5 a 1 ; ibid. 1873, 



p. 653 2 ; Champ. Ent. Monthly Mag. xlv. p. 104 3 . 



Eab. Honduras 3 (Salle); Nicaragua 3 , Chontales (Janson); Panama, Tole 3 (Cham- 

 pion). — Brazil 2 , Rio Janeiro 3 (coll. Fry). 



Wollaston x states that the specimens of this species found by Mr. Bewicke in the 

 decayed wood at the bottom of some boxes, possibly used to import plants, in Ascension, 



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and " Malay Is." as localities. There can be no doubt, however, that the home of this 



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might have come from the Cape of Good Hope or Mauritius ; later 2 , he adds, " Brazil " 



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insect is in Tropical America. Three examples only have been received from within 

 our limits, one of which is shown on our Plate, Wollaston's figure being too elongate. 



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RHINANISUS. 



Rhinanisus, Broun, New Zealand Journ. Sci. i. p. 489 (1883). 



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Various small, elongate, depressed Central- and S. -American forms, with the rostrum 



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mm* 



rather long, slender, and widened outwards (especially in the male), the eyes depressed, 



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the basal portion of the head globose and abruptly separated from the anterior portion 





the elytra pilose or setose at the apex, and the anterior coxae narrowly separated, agree 



* Cf. Col. iv. 4, pp. 92-97. 



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