INSECTA MADERENSIA. 13 



S. black, usually opake, depressed. Head rather large, with two deep longitudinal depressions on the 

 forehead. Prothorax transverse, wide in front, narrower and rounded posteriorly, with an im- 

 pressed transverse line behind the front margin, and a channel down the disk. Elytra elongate- 

 ovate, with the humeral angles very prominent and distinctly projecting beyond the outer margin, 

 deeply striated, the striae being impunctate ; with the entire margin (basal as well as lateral) 

 most minutely and obscurely granulated, and with a single row of tubercles (always minute) to- 

 wards the apex only. Antenna and legs as in the previous species. 



Readily distinguished from tlie S. abhremattis, Avitli wMcli however I had for 

 some time eoufotmded it, by its more elongated, depressed, and straightened form, 

 usually opake surface, by its prominent humeral angles which project perceptibly 

 beyond the outer margin of its elytra, and, more especially, hj the minuteness of 

 the granules and the total absence of tubercles, except at the extreme apex, along 

 the edges of the latter. Although the above characters are more than suiRcient, 

 of themselves, to establish the species, yet the fact that it is found in company with 

 the S. abbreviatus is additional evidence, were such necessary, that it is in reality 

 distinct, and no local variety of that insect. It seems to be peculiar to Porto 

 Santo, where it occurs, beneath stones, along with the car. (3. of the aS*. abbreviatus, 

 in the low sandy plains near the coast. It is however by far the rarer of the tAvo. 



Genus 4. APOTOMUS. 



(Hoffmansegg) Illiger, Mag.firr Ins. vi. 348 (1807). 



Corpus parvum, subcylindrico-oblongum, pubescens : mesothoi-ace cylindi-ico elongate angusto : protho- 

 mceparvo subgloboso, postice constricto : alis obsoletis. yin/en?!« longiusculfe filiformes, articulo 

 primo crassiusculo vk elongato, secundo reliquis subsequalibus cyliudricis breviore. Labium 

 Iseve transversum emarginatum, angulis anticis leviter productis. Mandibula vix porrectae. 

 Maxilla! bilobs, intus ciliatEe. Palpi filiformes : maxillares longissimi, articulo ultimo elongato- 

 cylindrico : labiales breviores, articulo ultimo acuminato piloso. Mentuni jugulo connatum, 

 transversum, antice emarginatum et dente medio acuto instructum. Pedes longissimi : tibiis 

 simplicibus baud palmatis, posterioribus ad apicem oblique excavato-truncatis spinisque munitis : 

 tarsis articvdo primo elongato, anticis in maribus leviter dilatatis : unguiculis simplicibus. 



The little genus Apotomus is confined chiefly to Mediterranean latitudes, and 

 the two or three species of which it is composed appear to be nowhere abundant. 

 The A. rufiis, — the only Madeu-an representative, — has been recorded in Spain, 

 Portugal, Italy, Sicily, the south of France, and in Algeria : and I possess, like- 

 wise, specimens from Corfu ; as also a species very nearly allied to it from Egypt, 

 collected at Cau-o by my friend Dr. H. Schaum of BerHn. The group recedes from 

 the typical Scaritides in having the tibiae simple and unpahnated, the maxillary 

 palpi extremely long, and the terminal joint of the labial ones pilose and acumi- 

 nated, — a cu'cumstance which caused Latreille to place it near to BembicUum, in 

 which the palpi are distinctly subulatcd. It is evidently however more nearly 

 allied to Difomus, a position universally conceded to it by recent entomologists. 



