192 



MANDIBULATA. TEICHOPTERA. 



the great length of the antennae, which are sometimes four or five 

 times as long as the body, and are usually very slender ; the wings, 

 especially the anterior, are also long and narrow ; the legs short, 

 sometimes having only a single pair of spurs on each of the four 

 posterior tibiae ; the eyes are in general very prominent, and the 

 palpi hairy. The indigenous species have been divided into the 

 following genera : — 



Tibiis posterioribus bicalcaratis ; 



Palpis maxillaribus art*. 2-bus basalibus brevibus : . 26. Cehaclea. 



art", basali solo breve : . . 27. LErTOCERUS. 



Tibiis posterioribus quadricalcaratis ; 



^Mfercraw gracilibus alis longioribus (inmasculis denticulatis): 25. Odontocerus, 

 incrassatis, baud alis loncrioribus, baud denticulatis : 28. Molanna. 



Genus XXV.— ODONTOCERUS, Leach. 



AntenncE somewhat longer than the wings, stoutish at their base, their innef 

 edge regularly denticulated nearly to the apex, which is slender, the basal 

 joint elongate, porrect and robust : palpi very pilose, maxillary with the 

 three basal joints rather short, somewhat cylindric and of equal length; the 

 4th elongate, 5th scarcely pilose, rather shorter than the 4th : head small, 

 transverse : ei/es large, subglobose : thorax robust : wings rather long ; 

 anterior elongate-eUiptic, rounded at the apex, the 2nd longitudinal nervure 

 furcate from about its middle, the 3rd bifid nearly from the transverse 

 nervure, the remainder simple and parallel, but the 4th is bifid in the 

 females ; posterior elongate-triangular : abdomen rather stout, obtuse at the 

 apex in both sexes : legs shortish : anterior and intermediate tibice with a 

 pair of short spurs at their apex, and the latter with a long pair near the 

 base, hinder ones with a long pair near the apex, and a similar pair on the 

 tip itself. Larva robust, fleshy, broad, cylindric, truncate at the apex : legs 

 short and slightly pilose. 



The denticulated antennae of these insects, exclusively of the 

 difference in the structure of the palpi, the neuration and opacity of 

 the wings, the double- spurred posterior tibiae, &c. sufficiently point 

 out their distinction as a genus ; to which may be added, that the 

 posterior legs of the larvee are shorter than the 2nd pair, and the 

 larva itself is robust and somewhat cylindric. 



Sp. 1. albicornis. Plate xxxiv. f. 1 ?. — Griseo-fuscus, alis griseis ant canes- 

 centibus vix maculatis, antennis albido-ochraccis. (Long. corp. 4—6 lin. ; 

 Exp. Alar. 15—18 lin.) 



