484 INSECTA. 



bimacidatus lives in ihc root of the Eryngium campestre, where it 

 also undergoes its metamorphosis(l). 



Myodites, Lat. — Ripidius, Thunb. — Ripiphorus, Oliv. Fab., Sec. 



Where the wings are also extended, but the elytra very short, in 

 the form of a truncated scale, or very obtuse at the extremity. The 

 hooks of the tarsi are indented beneath. The antennae are inserted 

 on the summit of the head, and strongly pectinated in both sexes — 

 on the two sides and forming long filaments in the males, and on 

 the inner side only in the females. The maxillse are but slightly 

 prolonged. The ligula is elongated and entire(2). 



Pei.ocotoma, Fisch. — Ripiphorus^ Payk. Gyll. 



These Insects approach the Myodites in the serrated hooks of their 

 tarsi; but their wings are covered by the elytra. The antenna:, in- 

 serted before the eyes, have but a single range of filaments or teeth 

 in both sexes. The scutellum is very apparent. The maxillae do 

 not project, and the ligula is emarginated(3). 



In the others, the wings are always covered by elytra extended 

 almost to the extremity of the abdomen and tapering to a point. The 

 posterior margin of the thorax is not lobate, or but very slightly so. 

 The abdomen of the females terminates in the manner of a tail, 

 pointed at the end. The eyes are sometimes emarginated. The 

 maxillary palpi are terminated by a large joint, securiform, or like a 

 reversed triangle. The extremity of the mandibles is emarginated 

 or bifid. The antennae, even in the males, are at most serrated. In 



MoRDELLA, Lin. Fab. 

 Or Mordella properly so called, the antennae are of equal thick- 

 ness throughout, and somewhat serrated in the males; all the joints 

 of the tarsi are entire, and the hooks of the last present one or two 

 indentations beneath. The eyes are not emarginated. 



M. Leon Dufour has observed in the Mordelle a bandes, two float- 

 ing salivary vessels longer than the body. The hepatic vessels have 

 no caecal insertion, an exceptive character in this section. 



M. aculeata, L. ; Oliv., Col., Ill, 64, 1, 2. Length two linesj 

 black, glossy, immaculate, with a silky down; an ovipositor as 

 long as the thorax, by means of which it introduces its ova into 

 the cavities of old wood(4). 



(1) See the Nouv. Diet. d'Hist. Nat., Ed. II, article Ripiphore. 



(2) Ibid., article Myode. 



(3) Ibid., article Pilocotomt; Fisch., Entom. Imp. Russ., II, xxxvii, 9. Several 

 species are found in Brazil. 



(4) Add the following' species of Olivier; fasdata, duodecim-pundata, odo-punc- 



