222 CLASS INSECTA. 



mity, and not terminated, as in the preceding sections, by 

 acute angles, form an orbicular palette, or a long square, 

 the under part of which is most frequently furnished with 

 brushes, or crowded papillae, without a vacancy in the 

 middle. 



The feet are usually narrow and elongated. The corslet 

 is often more narrow in all its length than the abdomen. 

 They frequent for the most part the banks of rivers, or 

 aquatic places. 



We shall divide the patellimani into those whose head 

 narrows insensibly behind, or at its base, and into those in 

 which the narrowing takes place abruptly behind the eyes, 

 so that the head seems to be borne on a sort of neck or 

 pedicle. 



The first may also be subdivided into two. 



Some, whose mandibles terminate always in a point, and 

 the palette of the tarsi is always narrowed, elongated, and 

 formed by the first three articulations, the second and third 

 of which being square, have the labrum entire, or without 

 remarkable emargination, and one or two teeth in the emar- 

 gination of the chin. The anterior extremity of the head 

 is not bordered. 



Here the under part of the palette of the tarsi presents, 

 as in the preceding, two longitudinal series of papillae, or 

 hairs, with one intermediate void, and not a crowded and 

 continued branch. The external palpi are always filiform, 

 and terminated by an articulation almost cylindrical, or cy- 

 lindrico-ovaliform. 



Sometimes the body is very much flatted. 



DoLicHus, Bon., 



Which approximate to the last sub-genera, and are removed 

 from all the following by the crotchets of their tarsi being 

 denticulated underneath. Their corslet is in the form of a 



