INSECTA MADERENSIA. 361 



yellowish-green lustre (which moreover is generally bright upon the scutellum). Antenna, and 

 apex of tarsi, ferruginous ; the latter at base fusco-piceous, and (with the extremity of the tibiae) 

 densely clothed beneath with long and pale pubescence ; femora and tibia either black, infuscate, 

 or entirely (especially when immatiu'e) of a dull brownish-ferruginous hue. 



Male, with the legs broad and robust. The tibia distinctly crenulated internally ; the four anterior 

 ones with a powerful inwardly directed spine at their inner apex ; the two anterior ones con- 

 siderably incurved at their extremity ; the intermediate ones less distinctly so ; the hinder ones 

 with no appearance of constriction before their extremity, but gradually and regularly dilated 

 from the base, — the extremity itself with its external surface expanded, the inner angle being 

 broadly emarginated (or scooped out) so as to form a rounded heel at a considerable distance 

 behind the apex, and the outer one being only slightly produced, and consequently almost a 

 right angle (though with the appearance of being more acute and prominent than it really is on 

 account of the strong setaj with which it is cihated) . 



Female rather smaller : with the legs much slenderer, and also perceptibly shorter ; the tibia being 

 most obscurely crenulated internally, and with an exceedingly small spine at their inner apex 

 (most perceptible in the intermediate pair) ; the two anterior ones very slightly incurved at their 

 extremity ; the intermediate and hinder ones, especially the latter, simple. 



A universal insect throughout all the islands and altitudes of the Madeiran 

 group, ahounding on many of the smaller rocks, where it congregates beneath 

 stones in the most exposed spots, in company with HelopidcB, Hadri, and other 

 genera of the Heteromera. It is a variable species, ranging from uniform black 

 into a brownish-piceous hue, and presenting differences of size and outline 

 according to the cu'cumstances under which it exists. It occurs from the sea- 

 shore to the extreme siunmits of the mountains, but would appear to attain its 

 maximum on the barren maritime sloj>es of rather a low elevation. In the sandy 

 plains of Porto Santo, as also on the adjacent rocks, it literally teems ; and on the 

 two northern Dezertas it is scarcely less common, — where moreover the specimens 

 average a comparatively gigantic size, and are, for the most part, of a more elon- 

 gated form. On the liighest points of the Dezerta Grande I have captured it, 

 particularly diu'ing the Avinter time, from out of the fissm'cs of the weather-beaten 

 peaks, in great profusion. In Madeu-a proper it is especially partial to localities 

 either but slightly raised above the level of the beach or else of a subalpine 

 natiu'e; and is decidedly both scarcer and less powerfully developed within the 

 sylvan districts than elsewhere. It is found at all seasons of the year; and is 

 usually very gregarious. 



Genus 123. ATLANTIS, Woll. (Tab. VII. fig. 3, 4, 5, et 6.) 



Corpus mediocre vel minusculum, oblongo-ovatum vel ovatuin, eonvexum, pube sat robusta plus 

 minusve variegatum : rostro ut in Laparocero, sed apicem versus baud attenuato, et ocuHs i-otun- 

 datioribus, prominentibus : jirothorace basi apiceque recto-truncato, ad latera rotundato (antice 

 paulo angustiore), elytris hand arete applicato : scutellu sat magno, triangular! : ehjtris subconnatis, 

 oblongo-ovatis vel ovatis, ad basin recto-truncatis et illic prothorace latiore, ad humeros rotundatis : 

 alts obsoletis. Antenna (VII. 5 a) longse subgraciles ; scapo curvato apicem versus facile incras- 



3a 



