196 INSECTA MADERENSIA. 



slopes of the Pico tie Faclio (IGOO feet above tlie sea), facing the south. It is a 

 species of Mediterranean latitudes, though apparently somewhat scarce. It is 

 recorded in the south of France ; and I possess specimens, also, from Sicily, which 

 agree in every respect with the Madeiran ones, except that they are just perceptibly 

 darker in their colouring. 



Genus 67. MICROCHONDRUS. (Tab. IV. fig. 2.) 

 Gueriu-Meueville, in litt. 



Corpus minutum, ovatum, convexum, pubescens, Jlycetscfe affinitate proximum sed ab eo (nisi fallor) 

 distinctum : prothorace lato, ad latera minute subcrenulato-marginato : alis amplis. Antenme 

 capitis pi'othoracisque longitudlne, clavatfe pilosa;, articulis primo et secundo (illo, subgloboso, 

 pnecipuc) robustis longitudiiie subtcqualibus (hoc subclavato), tcrtio ad octavum parns sub- 

 sequalibus, reliquis clavam magnam laxam perfoliatam triarticulataiu efScientibus (nono et 

 decimo subsequalibus subpocuHformibus, ultimo niagno ovato ad apicem oblique truncato). 

 Lnhrum (IV. 2 a) aiiipluin transversuni, antice membranaccum leviter emarginatum et ciliatum. 

 Mandibula (IV. 2 b) validje incurva;, apice acuta fortiter bidentatsCj intus late cmarginata; et 

 membrana tenuissima auctse. Maxilla (IV. 2 c) bilobse : lobo externa magno lato subovato valde 

 pubescenti : interno brevissimo angusto valde pubesccnti, apice acutissimo incurvo. Palpi 

 tnaxillares articulo primo minute, secundo longiore subclavato, tcrtio brenore transverse, ultimo 

 clongato-subovato : labiahs (IV. 2 d) robusti, articulo primo minutissimo, secundo longiore 

 crassiore subclavato, ultimo maxinio valde inflate globose apice truncate. Menium amplum 

 transvcrso-subquadratum, antice leviter angustatum mcmbranaceum integrum. Liijula ampla 

 lata, apice vix emarginata valde pubescens ciliata. Pedes graciles : tibiis rectis, apicem versus 

 leviter dilatatis : tarsis (IV. 2/) 4-articulatis, articulis prime et secundo inter sc arete cou- 

 junctis (suturS, segi-c observanda), ille hoc paido bre\dore, tertio secundi lengitudine sed paule 

 angustiore, ultimo elongate subclavato unguiculis simplicibus munito. 



A fitKph'i pan'us, et ^j^ot'S/ao? granum. 



The insect from which the above generic diagnosis has been drawn out is inti- 

 mately allied to 3Ii/cetceo, for which indeed it might, at first sight, be easily 

 mistaken. After a careful examination however of the various parts of its struc- 

 ture, I am inclined to believe that it may perhaps present sufficient differences to 

 warrant its separation from that genus : — an hjqiothesis which is rendered the 

 more probable since Mr. Westwood informs mc that it has in fact been already 

 detached liy M. Gudrin-^M^ncAille, who had sui)plicd him with a copy of the 

 dissections from his vmpubUshed manuscript, which appear miquestionably, in 

 spite of certain discrepancies, to belong to the species now imder consideration. 

 Although of an important nature, these incongruities are nevertheless such as 

 may be readily accounted for in objects thus small and difficult of observation ; 

 and it was not untU I had placed them beneath the highest magnifying poAver 

 that I succeeded, myself, in detecting their actual condition. Thus, M. Gueriu's 

 details represent the tarsi as composed of only three articulations, and the inner 

 maxillarv lobe as obsolete : whereas in realitv the former are tetramcrous ; and 



