102 PROCKEDINGS OF THE NATIONAL MUSEUM vol. in 



the medial lobe in length. Second maxillae with postmaxillary 

 sclerites not detected; pore entirely enclosed; isthmus broad and not 

 sulcate or saturate; telopodite normal, claw distally spoon shaped 

 with, two finely pectinate edges. Prehensors having no article with 

 denticles; ungula strongly curved over its distal third; poison calyx 

 subcordiform; poison gland passing out of the prehensor posteriorly. 

 Prosternum without sclerotic lines; anterior diastema broadly rounded 

 and shallow, without denticles. Tergites not suturate. Sternites 

 each much longer than wide, the majority weakly mediosulcate ; 

 pore fields of anterior third of body distmct but not raised, each 

 subcentral and transversely subelliptical; on last third of body each 

 pore field appears as a transverse single Ime of pores; sternites one 

 through the penultimate with undivided pore fields. Ultimate pedal 

 segment having pretergite laterally separated from its pleurites by 

 weak sutures, the tergite posteriorly rounded and much broader than 

 long; presternite broad and bandhke, medially weakly suturate or 

 sulcate; stemite is trapezoidal, sides and rear margin straight, greatest 

 length slightly greater than width at midlength; coxopleuron with 

 two homogenous glands, each gland ^vith one subcircular concealed 

 pore; each leg gi^eatly swollen and distally strongly attenuate, clothed 

 with numerous stiff setae, with two tarsal articles and a tiny tuber- 

 culate pretarsus. Postpedal segments with short uniarticulate 

 gonopods widely separated; terminal pores absent. 



From the foregoing summary descriptions, it is apparent that 

 Leptynophilus Chamberlin (1940, pp. 69-70) may be a junior synonym 

 of the Pocock genus, although the original description of Leptynophilus 

 is not sufficientl.y detailed or complete to permit a positive decision 

 in the matter. In any event, I am unable at this time to find con- 

 vincing grounds in Chamberlin's description for a generic separation 

 of T. setosum from L. mundus, the two type species. 



T. panamicum (1940, p. 69) is evidently a true I'aenioUnum, 

 although its original description does not show how it differs from 

 setosum, if indeed the two species are not conspecific. 



Note E, Antennal Setae and Special Sensilla: In genenil 

 there are three kinds of setae that invest the antenna: (1) Typical 

 setae occur generally over the surface of the antenna and vary from 

 short and thin to quite long and thin. All are pale in color, movably 

 affixed to distinct sockets (alveoli), and do not occur in special, re- 

 stricted patches. These setae are evidentlj^ concerned with the 

 reception of tactile environmental stimuli. (2) Hyaline spatulate 

 setae occur in distinct patches and are restricted to certain areas of 

 certain articles. These setae are very pale to translucent in color 

 and arise either from vague, degenerate alveoH, or else appear not 

 to be alveolate at all. In Caritohallex minyrrhopus, these setae are 



