On Heterocera from Costa Rica. 5G1 



head ; interorbital space narrow ; mouth extending to 

 below centre of eye ; no canines ; head naked, witli very 

 regular series of sensory papillae ; a short nasal barbel and 

 a pair of mental barbels. Dorsal VI, I 12 ; longest ray of 

 first dorsal nearly \ length of head. Anal I 9. Pectoral 

 as long as head. Ventral with well-developed anterior 

 membrane, not reaching vent. Caudal rounded. Caudal 

 peduncle If times as long as deep. Scales ctenoid, 37-40 

 in longitudinal series, 10-11 between dorsal and anal. 

 Yellowish brown above, speckled with brown, with 3 or 

 4 ill-defined dark brown cross-bars ; dorsal and caudal 

 fins spotted with dark brown ; a round blackish spot on 

 upper part of pectoral fin, near its base. 



Total length 80 mm. 



Three specimens from the Bengo River at Cabiii. 



Native name : Kimbunu. 



In the presence of a nasal barbel and a pair of mentals 

 this species differs from all the Gobius with barbels which 

 arc placed in the genera Chceturichthys, Ainosus, Triceno- 

 pogon, &c., and deserves to be made the type of at least a 

 subgenus, for which the name Nematoyobius is proposed. 



LXII. — New S/ ecies of Heterocera from Costa liica. — III. 

 By W. Schaus, F.Z.S. 



Lasiocarnpidae. 

 Claphe fraticesca, sp. n. 



Body above lilacine buff; the anal hairs and subdorsal 

 basal tult brownish. Foie wings : the basal area above sub- 

 median, and the medial space above vein 3 light grey with 

 two black points at end of cell; the costa finely, the innei 

 margin and marginal space light fawn-brown ; a white basal 

 s] ot below cell ; a curved geminate darker grey antemedial 

 line with a paler spot on costa ; the postmedial whitish buff 

 below vein 5, incurved at vein 2, oblique and geminate from 

 costa, angled at vein 7 and filled in with grey to vein 5, 

 where it is followed by a brown streak between 5 and 6; a 

 subterminal fine whitish lunular line ; below vein 5 a fine 

 paler line between subterminal and postmedial; a terminal 

 paler line. Hind wings buff; the veins beyond a medial 

 brownish shade slightly darker; the outer half of costa pale 

 reddish brown crossed by a subterminal paler line. 



Expanse 28 mm. 



llab. El JSitio. 



