104 Mr. T. V. Wollaston on Additions to Madeiran Coleoptera. 



articulo 2^° subtus prodiicto, 3*'° minuto, ultimo elongate clavato 

 unguiculis simplicibus munito. 



Obs. Genus corpore minutissimo pallido sericeo, prothorace antice 

 semicirculari (caput totum tegente) alisque amplissimis ciliatis Sen- 

 codero affinitate proximum et prima facie ilium simulans, sed species 

 est minor, antice minus dilatata obtusa, prothoracis angulis posticis 

 multo minus acutis (vix productis) et prsecipue antennis 1 1- (nee 10-) 

 articulatis, articulis inter se diversis. Cum Moronillo, Jacq. Duv., 

 antennis 1 1 -articulatis congruit, sed articuli sunt valde dissimiles, 

 corpus minus est necnon pubescens pallidum alatum (baud glabrum 

 apterum) et caput sub pronoto omnino absconditur. Ab Orthopero 

 (cui aliquo modo approximat) antennarum 11- (nee 9-) articula- 

 tarum structura necnon capite toto sub prothorace recondito, preeter 

 csetera, difFert. 



A /uKpos, parvus, et arayeros, gutta. 



The diminutive insect for which the present genus is established 

 vi^ould appear, at first sight, to partake almost equally of Seri- 

 coderus and Orthope^-us, — agreeing with the former in its pallid 

 sericeous surface and anteriorly-semicircular prothorax (which 

 entirely covers the head), and with the latter in its very minute, 

 suboval body^ and in its posterior prothoracic angles being almost 

 unproduced. Nevertheless it is at once separated from them 

 both by the structure of its antennse, which are not only 11- 

 articulate (instead of 10- and 9- respectively), but have the pro- 

 portions of their intermediate joints also quite different. In 

 minor details, Microstagetus recedes from Sericodervs in its 

 smaller size, more oval (or less obovate) outline, and in its pro- 

 thorax being less widened and with its hinder angles almost un- 

 produced ; whilst from Orthoperus its totally concealed head will, 

 apart from the characters of its antennse, immediately remove it. 

 In the number of its antennal joints it is (judging from M. Jac- 

 quelin-Duval's description and figure) coincident with Moronillus, 

 but in the shape and relative proportions of those joints it is per- 

 fectly distinct; whilst in its still smaller size, pallid hue, largely- 

 developed wings, and pubescent surface it still further recedes 

 from that genus, which (like the Madeiran Glceosoma^) is stated 

 to be both glabrous and apterous. 



* Until it be demonstrated either that I was wrong in considering the 

 antennae of Glaosoma to be lO-articulate, or that M. Jacquelin-Duval was 

 mistaken in regarding those of Moronillus as composed of 11 joints, it is 

 difficult to conceive on what jmnciple the latter has cited {vide ' Genera 

 des Coleopteres d'Europe, ii. 234) my Madeiran genus as a synonym of his 

 Moronillus, from the south of France ; for not only have I described the 

 antennae of Glaosoma as merely 1 0-articulate, but have even given a figure 

 of them ; so that (if he had doubted my statement) he might surely have 

 counted for himself! I admit that the two insects are very much alike in 

 external /aeies and sculpture ; nevertheless, on comparing lately a specimen 

 of his M. ruficollis, in the collection of the British Museum, with the 



