INSECTA MADERENSIA. 345 



with which we have here to do. I first discovered it, during April 1848, in Porto 

 Santo, where it was extremely common beneath stones in dry barren spots towards 

 the southern coast, — especially on the semi-cultivated slopes but slightly elevated 

 above the sea-shore : and, in May and June of 1850, I took it sparingly on both 

 the Northern and Central Dezertas, during my encampment on those islands with 

 the Rev. U. T. Lowe.- The Dezertan specimens are not, usually, quite so broad as 

 the Porto Santan ones, nor have theii' scales generally such a decidedly yellowish 

 tinge. I have not hitherto observed it in Madeira proper. 



§ II. Corpus rnhjits ; pediliits gracilioribits. 



267. Tychius albosquamosus, WoU. 

 T. oblongus niger, squamis diluto-cretaceis tectus, prothorace parvo angusto subtilissime punctato, 



elytris striatis, interstitiis impunctatis, rostro sulculis mediis profundis ante apicem abrupte ter- 



minatis longitudinaliter instructo, ocuHs reniformibus siibinferioribus. 

 Long. Corp. lin. vix 1;^^. 



Habitat insulam Deserts Grandis, qua Maio exeunte a.d. 1850 exemplar imicum sub lapide inveni. 



T. oblong ; black, clotbed with coarse chalky-white scales, and with apparently a few obscurer ones 

 intermixed. Rostrum proportionably shorter, and not quite so linear as in the last species 

 (being just perceptibly attenuated towards the apex) ; with the apical portion free from scales ; 

 coarsely wrinkled (though scarcely punctured) at the base ; and with several longitudinal sulci, 

 commencing a little before the middle and continued to within a short distance of the apex, 

 where they are suddenly and abruptly terminated: eyes large, reniform, and extending con- 

 siderably beneath the head. Prothorax very obscurely punctured, and in front minutely 

 granuled; small, and much narrower than the elytra,— being widest about, or perhaps just 

 behind, the middle. Elytra with the sides almost parallel (the humeral angles being nearly right 

 angles); striated (the striae being neither punctate nor crenate), and with the interstices im- 

 puuctate. Antenna and legs concolorous with the rest of the surface, being black; the former 

 however, and the tarsi of the latter, being alone almost free from scales. 



A most peculiar and distinct little Tychius, and hitherto unique. It may be 

 readily recognised by its deep-black surface (the whole of which, however, except 

 the antennae, the apex of the rostrum, and the tarsi, appears to be more or less 

 clothed with chalky-white scales), by its oblong and comparatively parallel outline 

 (the homieral angles being nearly right angles), by its small and most obso- 

 letely pimctm-ed prothorax (which is very much narrower than the elytra), by 

 its simple strise, and by ttie singular construction of its longitudinal rostral sulci, 

 — which commence gradually a little before the middle and are abruptlv and 

 entu'ely terminated at a short distance from the apex. It is apparently extremely 

 rare, the only specimen which has hitherto come imder my notice havino- been 

 captm-ed by myself, from beneath a stone, on the Dezerta Grande, at the end of 

 May 1850. 



2 Y 



