METOPIINI 209 



Metopioxys mattogrossoensis new species 



Type. Measurements: Head 0.522 from apex of antennal tubercle to 

 cervicum x 0.40 mm. through tempora; cervicum 0.08 mm.; pronotum 0.435 x 

 0.50 mm.; elytra 0.70 x 0.737 mm.; abdomen 0.563 x 0.70 mm.; total length 

 2.3 mm.; greatest width 0.737 mm. (PI. XVIII). 



Reddish-brown. Head, including long antennal tubercle, entirely minutely 

 granulate save for two glabrous oblong areas, one obliquely antero-median of 

 each eye. Cervicum transversely alutaceous. Pronotum entirely, minutely 

 granulate save for the lateral spines and their associated basal prominence. 

 Elytra and abdomen strongly shining. Pubescence very sparse. 



Head pyriform; tempora long (0.167 mm.) but relatively shorter than 

 in seeversi, not being much longer than the eyes. Eyes 0.134 x 0.08 mm. from 

 a dorsal view, composed of about 24 coarse facets, circular from a lateral 

 view. Head widest through tempora, narrowing rapidly anterior of eyes to a 

 prominent, upturned antennal tubercle, this tubercle relatively longer than in 

 seeversi. Vertex deeply, broadly, ovately sulcate between the eyes. Vertexal 

 foveae as in seeversi save that (1) they are more median, each fovea placed 

 mesiad of the mesial edge of the eye, and (2) larger, each fovea twice the 

 diameter of an ocular facet. Ventral surface of head and mentum as in 

 seeversi. 



Antennae eleven-segmented, contiguous; segment I very long (1.07 mm.) 

 nearly as long as rest of antennae (second to eleventh inclusive 1.34 mm.), 

 the antennae strongly geniculate and longer than body; first segment as in 

 seeversi; II elongate-obconical (0.167 mm.) ; III elongate-cylindrical (0.335 

 mm.) twice as long as second; IV, VI, and VIII distinctly shorter than V 

 and VII, fourth and eighth elongate-oval; fifth, sixth, and seventh elongate- 

 cylindrical; third to eighth subequal in width. Club of last three segments, 

 IX regularly oval, X circular from ventral view, transverse from dorsal view, 

 very asymmetrically transverse from lateral view, the dorsal face being 

 strongly produced; XI as in seeversi. 



Maxillary palpi as in seeversi save that the fourth segment is slightly 

 longer than second. 



Pronotum with a sharp, obliquely dorsal spine (0.187 mm. long), other- 

 wise as in seeversi save that (1) lateral longitudinal sulci and transverse sulcus 

 are more sharply defined and (2) the basal bead is vestigial and (3) the trans- 

 verse sulcus deepens medianly to form a distinct, glabrous fovea. 



Elytra as in seeversi save that (1) humeral spine is shorter and more 

 inclined, (2) basal elytral foveae relatively larger and deeper, (3) sutural 

 stria ends simply at apical nine-tenths. 



Abdomen with five visible tergites of which the first is as long as next 

 two united, these last two subequally long; fourth as long as first; fifth 

 slightly longer than first, rounded subtriangular. 



Seven stemites clearly visible. First as in seeversi; second longer than 

 third; third and fourth subequally long; fifth shortest; sixth and seventh sub- 

 equal medianly and both longer than second. The third, fourth and fifth are 



