236 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iis 



4. Disc of pronotum not at all sulcate. West Indies Ectmesopus 



Disc of pronotum usually more or less sulcate 5 



5. Antennae in male filiform with 3rd joint somewhat shorter than 4th . . . . 



Trichobrotica 



Antennae in male with 3rd joint short, often cup shaped, 4th joint usually 



much longer 6 



6. Terminal antennal joints in male not thickened 7 



Terminal antennal joints in male thickened 11 



7. Face of male with a spine over the labrum Platymorpha 



Face of male without a spine 8 



8. Antennae in male with median joints (5-7 or more) somewhat enlarged, front 



of face flat 9 



Median joints of antennae in male not enlarged, front of face rather 

 bulging 10 



9. Joints 5-7 in male sHghtly enlarged Simopsis, new genus 



Joints 5-9 in male noticeably enlarged Luperosoma 



10. In male, front of face with a median pore, antennal joints 9 and sometimes 10, 



somewhat triangularly widened at apex . . . Porechontes, new genus 

 Front of face in male without a median pore, antennae filiform . . Romanita 



11. North and Central America and Northwestern South America . Luperosoma 

 Southern Brazil Deuterobrotica 



Trichobrotica nymphaea Jlavicollis, new subspecies 



FiGUKE 3 



About 3.5 mm. in length, oblong oval, the middle tibiae in the 

 male deeply excised near the apex, pale yellow with a wide brown 

 elytral vitta covering most of each elytron, the margin and suture 

 yellow, legs with a brown streak on the femora, tibiae and tarsi and 

 antennae brown, the antennae with the three apical joints yellow. 



Head with the interocular space approximately half width of head, 

 occiput shining, impunctate, frontal tubercles distinctly marked, a 

 narrow carina down lower front, entirely pale yellow. Antennae 

 very long and slender, the third joint a little shorter than fourth, 

 remainder subequal, brownish with the three terminal joints pale 

 yellow, tip of apical one dark. Prothorax a little wider than long with 

 nearly straight sides, a faint depression in basal half, not well marked, 

 shining, entirely pale yellow. Scutellum pale. Elytra finely and 

 not densely punctate, with scattered erect hairs, margin pale and 

 a wide pale sutural vitta, on each elytron a broad dark-brown vitta 

 wider near the scutellum. Body beneath entirely pale, the femora 

 with a dark streak above on the anterior pair and the apices of the 

 femora dark in the two posterior pairs, tibiae and tarsi brown, the 

 middle tibiae of the male deeply incised near apex. Length 3-3.8 

 nun.; width 1.5-1.8 mm. 



Type, male, USNM 66856, from Paraiso, Canal Zone, one female 

 paratype, taken Feb. 6, 1911, and Mar. 30, 1911, respectively, by 

 E. A. Schwarz and A. H. Jennings. 



