BATRISINI 239 



Syrmocerus guarinus new species 



Type Male. 1.8 mm. long x 0.7 mm. wide through elytra. Chestnut brown, 

 semishining with coarse flavous sparse long semibristling pubescence. (PI. XIX) 



Head, including eyes, subtriangular with short tempora half as long as 

 eyes ; eyes large, composed of about 24 coarse facets. Occiput and posterior part 

 of vertex with a median, longitudinal carina. Vertex and occiput subglabrous t-o 

 the antennal tubercles, with a pair of deep, circular, nude vertexal foveae be- 

 tween the eyes. These foveae connected by an arcuate sulcus which widens and 

 deepens apically to form a large, median depression between the antennal tu- 

 bercles. Antennal tubercles large, tumid, subtriangular and very coarsely punc- 

 tate, sparsely pubescent. Between and just anterior to the vertexal foveae is a 

 median vertexal tubercle; this tubercle is subconical, coarsely punctate dorsally 

 and with its width, length, and height equal and obliquely truncate at apex. 

 Front entirely concerned with the excavation noted above, the inter-antennal 

 line being entirely concave. Clypeus triangular with a sharp apical angle; medi- 

 anly strongly elevated into a high laminoid longitudinal crest, the crest being 

 dorsally flat and pubescent and abruptly cut off posteriorly at the frontal ex- 

 cavation ; a very small tubercle each side of crest. Therefore from a dorsal view 

 the head appears quadrituberculate, with the vertexo-frontal excavation being 

 bounded anteriorly by the clypeal crest, laterally by the antennal tubercles and 

 posteriorly by the vertexal tubercle. Ventral surface of the head transversely 

 tumid in apical third; very coarsely punctate, without tubercles, and with the 

 punctures becoming more sparse and strigose medianly. 



Maxillary palpi as in Arthmius. 



Antennae eleven-segmented, distant, coarsely punctate; segment I simple, 

 elongate obconical; II elongate, narrower than first; III elongate-obconical; 

 III, V, and VII longer than IV, VI, and VIII; III to VI subequal in width; 

 VII obtrapezoidal ; VIII smaller than either VII or IX. 



Pronotum characteristic of genus ; widest through apical three-fourths, with 

 prominent apical and nearly rectangular basal angles. Disc strongly medianly 

 elevated in the form of an obsolete carinoid crest as in Group I Arthmius. 

 An entire transverse sulcus at basal fourth, with the discal tumidity abruptly 

 falling to base basal to sulcus; posterior wall of sulcus beaded, the bead ex- 

 panded and angulated laterally into a tumid area to lateral margin. Each 

 lateral margin sharply incised, the incisure continued apico-medianly as a large, 

 oval, pubescent fovea typical of genus, and the incisure abruptly limited pos- 

 teriorly by the bead of the transverse sulcus, Pronotal integument subglabrous. 



Each elytron with an entire sutural stria, no dorsal stria or impression, the 

 humeral angle obliquely well-defined, and with three deep, nude, circular foveae. 

 Integument sparsely punctulate. 



Five tergites, the first large, the last subtriangular with rounded, non- 

 tuberculate apical profile; margins as in Arthmius. 



Six clearly visible stemites (morphologically II to VII), of which the first 

 four are progressively shorter; fourth medianly, transverely creased or narrowly 



