150 INSECTA MADERENSIA. 



The insect for the reception of which the present genus is founded bears, at fii-st 

 sight, a strong resemblance to a Bhyzophagus, but the details of its mouth and 

 tarsi point out at once its true location, amongst the Colydiadce, — from some of 

 the members of which it is not very remotely distant. Still, there are a few points, 

 it must be confessed, in which it approaches i?%co/;//r'^?/*, especially in its slender, 

 aciculated outer maxillary lobe, and its truncated el)i:ra; though the abundant 

 characters in which it recedes from it are sufficient to remove it altosrether from 

 that group. Thus, the structiu-e of its antennae will at once be noticed, which are 

 not only shorter and more robust, but want likewise the elongated thii-d joint of 

 Rhyzopliagus, and have their club, in lieu of a solid one, much perfoliated, — beiag 

 composed of two subequal, loosely-connected parts, the fli'st of Avhich is large and 

 cup-shaped, and the second globose and obscurely annulated (as though made up 

 of two). It differs moreover very considerably in the form of the largely developed 

 head of its males, which is not only (as indeed is the case in both sexes) constricted 

 into a tolerably distinct neck posteriorly, but is, likewise, broadest just behind the 

 eyes. The edges of the jugulum, underneath, are so much developed laterally as 

 to be apparent from above, the projecting portion seeming, at first sight (especially 

 in the males, where it is largest), to belong to the lateral margins of the head 

 itself. The eyes, ujilike those of Bhyzophagus, are large and prominent ; and the 

 entu'e insect, instead of being glal)rous, is, both above and below, pilose. The 

 elytra are much more abbreviated posteriorly than in any of the Rhyzophagl, being 

 broadly and transversely truncated, — exposing the pygidium, which is greatly elon- 

 gated. The legs arc slenderer also, and somewhat shorter, and without any 

 appearance on the tibite of external teeth ; wliUst the feet, instead of being hetero- 

 merous in one sex, are, as in most of the Colydiadce, quadi-iarticulate throughout. 



123. Em-ops impressicoUis, WolJ. (Tab. III. fig. 2.) 



E. angustus subcylindi'ico-linearis rufo-ferrugineus et parce pubescens, capite prothoraceque remote 

 punctatis, hoc elongato-quadrato in disco profunde longitudinaliter impresso, elytris punctato- 

 striatis pallido-testaceis sed ad apicem nigro-infuscatis, pcdibus testaceis. 



Long. corp. lin. li-l?. 



Habitat in insula Desertae Grandis, rarissimus, — Maioexeunte a.d. 1850, apricitate volitans, a meipso 

 deprehensus. 



E. narrow, linear, somewhat cylindrical, sparingly pubescent, shining, and rufo-ferruginous. Head 

 and prothorax remotely but rather deeply punctured : the former large (especially in the males) 

 and wide, — though widest immediately behind the eyes, and from thence suddenly constricted 

 posteriorly into a neck, which is tolerably apparent when the head is at all protruded ; gradually 

 a little dilated, on either side, in front of the eyes, and, likewise, elevated into somewhat of a 

 ridge, out of which spring the antennse, — these ridges causing, in conjunction with the slightly 

 convex clypcus, two oblique depressions, or sulci, to appear on the forehead ; the lateral portions of 

 the Jugulum, underneath (III. 2 a), are so much produced, or swollen (particularly in the male sex), 



