292 NEOTROPICAL PSELAPHIDAE 



Fourth segment with apical face angulate and bearing at angulate 

 apex a slender palpal cone, in addtion to the appendage of the 

 external face CTENISODES 



In the above generic key I have material in all four genera so that I am 

 confident of the larger taxonomic aggregates but less so of the limits of many 

 of the species. In two cases I have assigned my specimens to species previously 

 described. These species were named many years ago and the structural detail 

 is very incompletely set forth. The sympathetic reader will understand the risk 

 taken in such cases, yet without the types for direct comparison I am unable 

 to state positively that the material is new to science in these two particular 

 instances. 



ENOPTOSTOMUS (Schaum, 1864) 



This fairly large genus is found in Africa, Asia Minor, and as far north 

 as Portugal and Greece, and as far east as Sumatra. In addition a single species 

 is placed here with doubt by Raffray from the neotropics. I share Raffray's 

 apprehension that it may belong to some other genus but do not know the 

 species. My material in the genus belongs to Enoptostomus aubei (Rosen- 

 hauer) collected by Simon at Algeciras, Cadiz, Spain, and identified by the 

 illustrious Reitter. The maxillary palpi are so different from other genera that 

 should another specimen of clandestinus be found the question of generic 

 status can be quickly answered. 



clandestinus Schaufuss. 1886. Brazil, (cf. Raffray, 1904, 1908) 



CTENISIS (Raffray, 1890) 



Raffray (1890, 1896, 1904, 1908, 1908a) 

 Sharp (1874) (Tetrads), (1887) {Desimia) 

 Casey (1893) 

 Bowman (1934) 



In this genus, where both sexes are known for the same species, the sex 

 can be diagnosed by the antennal proportions. The males have a prominent 

 club formed by the last four segments (VIII-XI) which are generally elongate- 

 cylindrical; the eighth segment is conspicuously larger than the seventh, and 

 segments IV-VII very small. The females have segments IV- VII relatively 

 larger than the same segments of the male, the eighth segment is similar to the 

 seventh, and the club is more or less composed of the last three segments. 



Key to the Males 



Segment VIII as long as the four preceding united 2 



Segment VIII as long as the five preceding united 4 



2. Not known south of Mexico rajjrayi 



Not known north of the Amazon basin 3 



