Tetrigine in the Oxford University Musewm 227 
the interior border often bearing a tubercle on each side, the pos- 
teror angles widely laminate, produced outwards and triangular 
acute, obliquely truncate behind. Elytra and wings wanting. 
Anterior femora elongate, lobate ; posterior femora above externally 
bearing a series of large subrounded tubercles, and at the middle 
bituberculate, margins serrulate, the genicular and antegenicular 
denticles stout, subtriangular, posterior tibe little ampliate towards 
the apices, the canthi plurispinose and minutely serrulate. 
1. O. latihumerus, sp. nov. (Plate XXI, fig. 4.) 
Body obscure ferruginous, infuseated, legs fuscous and pale 
annulate. Pronotum dilated between the humeral angles, the dorsum 
having the anterior gibbosity distinctly elevated, convex forward and 
declivous backward, posteriorly provided with two pairs of low 
subacute nodules ; the posterior angles of the lateral lobes having the 
margin behind the thoracic spines somewhat serrulate. Anterior 
femoral margins above subbilobate, with a median denticle below ; 
the posterior femora having the first denticle situated at the middle 
of the external pagina little produced, the second smaller. Length 
of body entire, female, 12°5 ; pronotum 10 mm. ; posterior femora 
7 mm. 
One example from N.E. Madagascar, Bay of Antongil, 
Mocquerys ; Oxford Museum. 
Section METRODORA, Bolivar. 
Genus SYSTOLEDERUS, Bolivar. 
1. S. greent, Bolivar, Ann. Soc. Ent. France, vol. Ixx, 
p- 584, 1901. 
Six examples from Pundaluoya, Ceylon; Oxford Museum. 
2. S. parvus, sp. nov. 
A small species, smoothly granulate ; cinero-ferruginous, with 
black wings. Head little exserted; eyes globose and strongly 
approximate : vertex narrowly accuminate; frontal costa between 
the eyes vertically declivous, not at all sinuate; antenne inserted 
distinctly before the eyes; posterior ocelli placed on a plane with 
the antero-ventral border of the eyes. Pronotum smoothly granu- 
late, anteriorly truncate, cylindrical forward, and behind the anterior 
margin slightly ascendant, posteriorly subulate; median carina of 
pronotum very thin, low, and indistinct; the posterior angles of the 
lateral lobes turned down, subobtuse. Elytra light, elongate, 
margins above substraight, below curvate, acuminate forward and 
