﻿248 I April, 



inwards ; outside slightly convex ; seen from above, the whole pala has 

 a flattened and twisted appearance, resembling one of the blades of a 

 steam-ship's screw-propeller. 



The following species, in the form and width of the head, in the 

 eyes not reaching the posterior margin, in the presence of the facial 

 depression in both sexes, and in the form of the pronotum, recedes 

 from the type of Corixa, and approaches Cymatia, and it may hereafter 

 be deemed desirable to establish for it a new genus, which may probably 

 also include Qorixa Bogenhoferi, Fieb. 



CORIXA ALPESTRIS, 71. Sp. 



Corixa alpestris, Buchanan White, in litt. 



Black, shining. Head considerably wider than the pronotum, 

 prominent in front ; facial depression in both sexes. Pronotum and 

 clavus delicately rastrate. Pronotum short, angular posteriorly, disc 

 with a distinct longitudinal keel on the anterior half, and about eight 

 indistinct, impressed, concolorous, transverse lines. Clavus and corium 

 with very fine, scarcely perceptible yellowish lines. Pales in both sexes 

 narrow, very long-cultrate, in the <$ , seen from the side, at the base, 

 on the upper-side, roundly widened, the dilatation, seen from above, 

 forming a long, cordate depression. 



Head, including the eyes, much wider than the pronotum, anteriorly convex, in 

 front prominent beyond the eyes, posteriorly, on each side piceous, depressed, 

 the middle rather elevated, on each side of which, and along the margin of the 

 eyes, is a row of punctures, other scattered punctures are also on the crown ; 

 posterior margin sharply raised, extending behind the eyes. Face covered 

 with very long, projecting, yellowish hairs ; facial depression in $ oval, 

 concave, extending on the frontal prominence beyond the eyes, in ? piceous, 

 flat, extending only to the middle of the eyes ; lalrum yellowish-brown. 



Thorax : pronotum short, pentagonal ; sides short, nearly straight, hinder sides 

 nearly straight, apex obtusely pointed; disc slightly convex, with about eight 

 transverse, scarcely perceptible, slightly impressed concolorous lines (in some 

 examples, in certain lights, the intervals are indistinctly yellowish at the 

 ends) ; on the anterior half of the disc a distinct longitudinal keel. Elytra : 

 clavus with delicate, undulating, interrupted, transverse lines rarely reaching 

 the inner margin, more distinct at the base ; claval suture raised, distinct : 

 corium, clothed with very fine, short, decumbent, yellowish hairs and with deli- 

 cate, undulating, much interrupted, yellowish, transverse lines, the posterior 

 inner angle almost devoid of marking j membrane-suture obsolete, and the 

 markings continued over it ; marginal channel livid black : membrane with 

 markings like those of the corium, short and parallel on the inner side, the 

 margin all round black, unspotted. Sternum : prostemum side lobes pale 



