INSECTA MADERENSIA. 509 



quadratOj ad angiilos anticos soepius porrccto : metasterno postice vix bifido : ehjtris connatis : alls 

 obsoletis. Antenna (XI. 7 b) et instrumenta cibaria (XI. 7 a, 7 c, 7 d) fere ut in genere prsece- 

 dente, sed ilhs apicem versus minus incrassatee et articulo ultimo brevi oblique truncate ; maxil- 

 larum lobus internus simplex (nee biuncinatus) ; palpoinim ■maxillarium art.iculus ultimus minor et 

 vix secm'iformis ; palpi labiales longiores graciliores ; et mentum multo amplius, ligulam fere 

 tegens. Pedes plerumque elongati graciles : tibiis fere glabris^ aut minutissime setulosis : tarsis 

 heteromeris ; posterioribus (sed prsesertim posticis) articulo primo elongato. 



The present genus, apparently the only Madeii'an representative of the Ten- 

 tynad<v, may he known hy its more or less quadrangular prothorax, by its anteriorly 

 rounded and porrected clj'peus, and hythe minute, ohliquely truncated apical joint 

 of its antennse. As in the rest of the department to which it belongs, its mentum 

 is largely developed (almost entirely concealing the ligula), and the terminal 

 articulation of its maxillary palpi is hut slightly dilated (being far less securiform 

 moreover than is the case in the previous families of the AtracheJki). The under 

 side of its head has usually more or less of a grooA'e and rounded impression in the 

 centre of the jugulum (behind the mentum) ; and its internal maxillary lobe is 

 simple, being never armed (as in Blaps) with an additional claw. Although but a 

 single Hegeter* would seem to enter our fauna, the genus may be said, nevertheless, 

 to be eminently characteristic of the whole of these Atlantic islands : for, whilst 

 endemic species are being gradually brought to light in each of them, and whilst 

 one or two have not only overspread all, but have even been reported from the 

 nearest European and African shores (as, for instance, the H. elongatus from 

 Senegal, and the S. Amaroides from Spain), the existence of a collective mass, as 

 it were, in the Canarian group points to that particular region as the probable 

 area from whence the greater number of them were originally diffused. On the 

 Salvages we find a modification peculiar to those rocks t ; but, as just stated, it is in 



* lu the fourth vohune of the Ann. de la Soc. Enf. de France, there are two recorded by Solier, — 

 namely the H. sfriatus, Lat. (/. e. the elongatus, Oliv.), and the H. Amaroides, — as Madeiran, though only 

 on the evidence of Dupont'a collection. It is possible indeed that the latter may be foimd in these 

 islands, for it is abimdant in the Canaries ; yet, as I have not myself succeeded in detecting it, and since 

 it has equally evaded the researches of the Eev. E. T. Lowe, Professor Heer, Dr. Albers, iM]M. Hartimg, 

 Eousset and others, I have preferred not admitting it into our fauna, — inasmuch as it is far from imlikely 

 that some mistake may have arisen respecting the locality ; and more especially so, since such-like errors 

 are of constant experience in general collections, formed of necessity through various (and not always 

 particidarly correct) media. It is the same authority which pronounces it to occur in the south of Spain ; 

 and although I have not the means of testing (and woidd not therefore wish to doubt) the accuracy of this 

 statement, j'et I cannot but regard the Madeiran habitat as at any rate uncertain. I woidd on no 

 account however aiiirm that it actually does not exist in oiu- present group, since, next to the common 

 H. elongatus, it woidd seem to have the greatest diftusive powers (and therefore there is no reason, 

 ct priori, why it shoidd not be Madeiran as well as Canarian) : nevertheless, if such be the case, it is 

 exceedingly remarkable that it should have hitherto completely escaped the combined investigations of so 

 many working naturalists. 



t This species evidently approaches one or frvvo from Teneriife, — of which indeed it may be perhaps 

 but an altered state from long seclusion on these barren and exposed rocks : nevertheless, since it does 

 not exactly accord with the description of any of those given byBrulle in Webb and Berthelot's work on 



