127 



of the shape of its elytra, aud thus becomes a connecting link between the two 

 tribes. From the other genera of Corylophina, Microstagctus may be known by its 

 pubescent surface, and by the remarkable shape of the joints of the anteunfe. 



Microstagetus parvulus. 



M. parvulus, WoUaston, Ann. and Mag. Nat. Hist. (3) viii. p. 106, 1861. 



L c. iVt^6 liii-='75-"87 mm. — Ovatus, postice sat attenuatus, valde convexus, 

 nitidus, ferrugineus, pilis iiavis sat dense vestitus ; capite, pronoto obtecto, magno, 

 oculis magnis, valde promineutibus ; pronoto parvo, antice cireulariter rotundato, 

 margine anteriori integra, reflexa, leviter sed confertim punctato, margine basali 

 modice sinuata, angulis valde acutis, parum productis ; elytris pronoto parum 

 latioribus, fere duplo longioribus, pone humeros latissimis, profunde et confertim 

 punetatis, lateribus late marginatis, apice rotundato ; pedibus longis, gracilibus, 

 flavis ; anteunis longis, robustis, Iiavis. 



Head covered by the thorax, large ; eyes large and very prominent ; antennae long, 



robust, yellow. 

 Thorax small, circularly rounded, with the front margin entire and reflexed, lightly 



but closely punctured, basal margin moderately sinuated, with the angles 



slightly produced and very acute. 

 Scutellum moderate, obtusely triangular and deeply punctured. 

 Elytra rather broader, and nearly twice longer than the thorax, widest behind 



the shoulders, deeply and closely punctured, sides strongly margined, apex 



rounded, entire. 

 Legs long and slender, yellow. 

 Under parts testaceous. 

 Habitat, Atlantic Islands. Found in Madeira by Mr. Wollaston in hot-beds. 



OLIGARTHRUM. PI. IV., C. 



Olifiarthrum, Matthews, Ann. and Mag. Nat. Hist. 1887, p. 110. 



Corpus ovale, convexum. 



Caput modicum, sub pronoto totum occultum, ore modico ; oculis sat magnis, 



prominentibus ; antennis prope oculos insertis. 

 Antenna (PI. IV., C, fig. 7) sat breves, S-articulatse ; 1 sat magno,_ pyriformi, 



modice recurvato ; 2 gracili atque brevi ; 3 secundo parum longiori et latiori ; 



4 tertio fere duplo longiori et latiori ; 5 perbrevi, transverso ; 6-8_ valde 



incrassatis, clavam subfoliatam formantibus, apicali casteris multo majori et 



obtuse acuminato. 

 Valpi non dissecti, sed in situ visi articulos ad modum Corylophorum typicorum 



formatos omnes exhibuerunt. 

 Partes alise oris non examinatae. 

 Pronotum magnum, margine anteriori integra, valde rotundata, margine basali 



sinuata, angulis sat acutis. 

 Scutellum modicum, rotundatum. 

 Elytra integra, sat longa, obtusa. 

 Alee atque Abdomen non examinatae. 

 Prothorax (PI. IV., C, fig. 2, a) prosterno parvo, inter coxas sat late elevato atque 



pone eas dilatato ; episternis inconspicuis ; efimeris sat magnis, coxarum 



receptacula partim cingentibus ; receptaculis coxarum magnis, ovalibus, antice 



atque postice partim apertis, prosterno elevato divisis. 

 Pectus mesostcrno (PI. IV., C, fig. 2, d) sat brevi; episternis magnis, suboblongis ; 



epimeris humeralibus, angustis, a receptaculis coxarum remotis; receptaculis 

 coxarum magnis, fere circularibus, modice distantibus. 



