368 INSECTA MADERENSIA. 



diluta robusta depress^ variegatus, prothorace punctate, elytris punctato-striatis, pilis longis 

 suberectis adspersis, ubique confuse variegatis et interstitiis alternis indistincte tessellatis, an- 

 tennis breviusculis ferrugineis articulo tertio secundo longiore. 



Mas, pedibus robustis latis : tibiis intermediis apice parum robuste arniatis ; anticis intus obscuris- 

 sime crenulatis, apicem versus facilius et leviter emarginatis atque ad apicem incurvis ; posticis 

 (VII. 5*) ante apicem constrictis, ad apicem subito valde explanatis, angulo interno oblique 

 tmncato (calcaueum acutum subtriangularem pone apicem exstantem efficiente), externo 

 acuminato valdissime exstante. 



Fcem. paulo major; pedibus gracilioribus sed baud brevioribus, simplicibus. 

 Long. Corp. lin. 3i-4j. 



Habitat in locis similibus ac A. lamellipes, noctivagare amans. 



A. elongate-ovate, piceous-black, and densely variegated with a robust, decumbent, greenish, golden- 

 green, and somewhat coppery pubescence, — which reflects more or less of a metallic splendour. 

 Rostrum and prothorax as in the A. cahatrix, the latter perhaps a little more distinctly punc- 

 tured. Elytra as in the A. calcatrix, only usually rather more brilliantly variegated, the alter- 

 nate interstices being much less regularly tessellated than those of the A. lamellipes. Antenna 

 and legs as in the last species ; though the former wth the second joint of their funiculus 

 usually more evidently longer than the first, and with their club somewhat slender and elliptical. 



Male, with the legs broad and robust. The two anterior tibia with their apical spine obsolete, very 

 obscurely crenulated internally, gradually and slightly emargiuated (or scooped out) towards 

 their extremity (though very much less so, and much more gradually, than is the case with the 

 A. lamellipes) so as to form a gently-rounded, though perceptibly broader portion (or calf) 

 towards their base, — with the extremity itself slightly incurved ; the intermediate ones with the 

 spine large and robust (though not quite so large as that of the A. calcatrix), and, likewise, 

 sliglitly incurved at their extremity; the kinder ones constricted before their extremity, — the 

 extremity itself with its external surface suddenly and greatly expanded out, the inner angle 

 being obliquely truncated so as to form a heel (which is considerably produced, though far 

 less so than in the last species, and somewhat beak-shaped, being extremely angular at its 

 termination) behind the apex, and the outer one being produced into a prominent and acu- 

 minated process (not quite so prominent however as that either of the A. lamellipes or of the 

 A. calcatrix). 



Female, rather larger; with the legs slenderer, though not shorter, and simple. 



The distinctions between the present insect and the last have been already 

 pointed out, — the respective modifications of then* male tibia} being, on account of 

 their constancy, the most imiiortant of them. Like the whole of the tiipical 

 Atlaiitides except the A. cespevtiniis, the A. noctkagans is essentially a sylvan 

 species, occm*ring- at lofty elevations (often in company with the A. lamellipes), 

 and being most abtindant towards the upper extremity of the forest regions. 

 During my encampment at the Fanal, in July 1850, 1 captm-ed it, as lately stated, 

 in the utmost profusion, — where it congregates beneath the loose bark of trees, 

 and under moss and Uchcn, bv dav, beimr active onlv at nio^ht. 



