70 NEOTROPICAL PSELAPHIDAE 



will key out here if the shape of the posterior coxae has not 

 been correctly diagnosed. It belongs in the Brachyglutini). 

 (PI. XIV) 



36 (34). Tenth antennal segment symmetrical and lenticular (biconvex 



or bean-shaped) 37 



Tenth antennal segment asymmetrical and transversely tri- 

 angular 38 



37 (36). Dorsal surface of head with a pair of deep, longitudinal sulci 



which are parallel to each other, and do not unite anteriorly 



TRIMIODINA 



Dorsal surface of head without sulci, or the sulci very vestigial, 

 hardly perceptible 44 



38 (36). Head small, triangular, distinctly narrower than pronotum 



PSEUDOTRIMIUM 



Head large, much wider than pronotum 



TRIMIOPSIS (in part) 



39 ( 7 ). Pronotum with a median, longitudinal sulcus which is nearly 



entire and extends from near base to near apex, crossing 

 the transverse subbasal sulcus at right angles (PI. VIII, 



11) FLETCHEREXIUS, new genus 



Pronotum with disc either (a) wholly unmodified, or (b) with 

 a central median fovea 40 



40 (39). Pronotal disc simple, not foveate; tenth and eleventh anten- 



nal segments bilaterally asymmetrical; tenth segment much 

 wider and longer than the ninth, and of a rounded-triangular 

 shape, very asymmetrically articulated on the antero-mesial 

 face of the ninth, so that both ninth and eleventh segments 

 are in contact laterally and widely separated mesially by 

 the wedge of the tenth segment (PI. VI, 10) . .MELBAMIMA 

 Pronotal disc with a median fovea; tenth and eleventh anten- 

 nal segments bilaterally symmetrical; tenth segment normal, 



transversely pyramidal, and normally articulated 



VERABAROLUS, new genus 



41 (26). Head small, much longer than wide; first two tergites of equal 



length; tarsi with a single claw ACOTEBRA 



Head large, more or less transverse; first tergite longer than 

 second; tarsi with two claws of nearly equal length, the inner 



claw much thinner and slightly shorter 



ANARMODIUS (in part) 



42 ( 9 ) . Ventral surface of the head with a strong median sulcus ; pro- 



notal margins with a strong tooth near the middle, on each 

 side ; base of elytra with four f oveae but no transverse basal 



carina XHERIUS 



Ventral surface of the head with a basal, circular gular fovea 

 but no median sulcus; each lateral pronotal margin with a 



