338 NEOTROPICAL PSELAPHIDAE 



Raffray to suggest some approach to Pseudotychus of South Africa and 

 Eudranes of Australia. Finally the general form suggests the subgenus 

 Hamotoides but the nonsulcate pronotum suggests Hamotus proper. 



punctatus Raffray. 1908. Nouveau-Fribourg, Rio de Janeiro, Brazil. 

 Genotype. 



CERCOCERULUS (Raffray, 1904) 



This is a monotypic Brazilian genus. Originally placed in Phalepsus, the 

 genotype was removed by Raffray because of its large, equal tarsal claws. Struc- 

 turally it shows many affinities with the subgenus Hamotus but is unique among 

 neotropical tyrines on the basis of its maxillary palpi. 



These organs are similar to those of the Australian Rytus. The large maxil- 

 lary palpi have a minute first segment, which however, is slightly wider than 

 the base of the second; second segment about three-fourths as long as fourth, 

 slightly arcuate and very slender for basal two-thirds then inflated to the 

 rounded apex; third obconical, longer than wide, less than one-third as long as 

 fourth; fourth distinctively shaped, gourd-like, with a wide ovoidal basal half 

 and a subulate spinoid apical half, with the internal face having a striaform 

 longitudinal sulcus from near apex to middle of segment (PI. XX). 



hirsutus (Schaufuss). 1886. Amazon basin, Brazil. Genotype. 



TYROGATUNUS new genus 



This new genus is distinct from other Tyrini on the key characters pre- 

 viously given, but several morphological features necessitate further elabora- 

 tion. The t€rmitocolous members of Tyrogatunus have a novel eye structure, an 

 unusual distal palpomere, and peculiar pubescence. 



The eyes are slightly postmedian in position, reniform in lateral view as 

 customary in the tribe, and are flanked with a strong infraocular spine; each 

 eye is composed of about 62 facets. These facets are not uniform in size or shape. 

 The dorsal third of each eye holds some 22 facets which are very flat, and signi- 

 ficantly greater in diameter while the ventral two-thirds holds much smaller, 

 normally convex facets. This striking condition is found in both sexes (PI. 

 XVII, 1). 



The pubescence is very long (0.20 mm.), moderately abundant (about 5 

 setae per 0.005 sq. mm.), bristling and golden. These setae are thin-shafted with 

 the distal third to fourth excessively thin and tending to curl (PL III, 6) in 

 various directions, so that from an optical view the setal tips present a variably 

 developed mat. 



The maxillary palpi (PI. XX) are large with the first three segments formed 

 as in Tyropsis and Neotyru^ in general and their detail can be seen in the illus- 

 trations. The fourth or distal palpomere is distinctive. It is long (0.22 mm.) and 

 is a fusiform shape, with the base subpedunculate and the apex rounded. The 

 unique feature is a longitudinal sulcus on the dorsal face, that is, when the 

 specimen is seen from above the sulcus is in full view, the internal face being 



