222 



PSrCHE. 



[May— July 1889. 



NOTES ON THE EPIPHARYNX, AND THE EPIPHARYNGEAL 

 ORGANS OF TASTE IN MANDIBULATE INSECTS. 



BY ALPHEUS SPRING PACKARD, PROVIDENXE, R. 1. 



(Concluded from p. 199.) 



Order Platyptera. 



Pteronarcvs pupa. — In a specimen 

 from Pagosa, San Juan River, Colora- 

 do, the surface of the labrum is pro- 

 vided with stout curved setae which are 

 often forked at the end, like those occur- 

 ring on the joints of the antennae and 

 caudal stylets. The epipharynx is 

 densely pilose on the edge and over the 

 surface, but there are no sense-cups or 

 rods. 



Perla sp. — In a specimen from the 

 Glen, N. H., the labrum is broad and 

 very short, full and rounded, and there 

 is no trace of a median furrow. The 

 epipharynx has a narrow, curved, long, 

 transverse area parallel to and situated 

 near the front edge, on which are 

 two opposing sets of broad-based 

 "gathering" or "hooked" hairs; else- 

 where the surface is covered with fine 

 tactile setae, which arise from a cup- 

 shaped base. There is a median furrow 

 free from these setae, and I cannot detect 

 an}' genuine taste-cups. 



In another species from Montana 

 there is the same structure of the 

 epipharynx, which bears at the end a 

 number of tactile setae arising from a 

 cup-shaped base, but there are no true 

 taste-cups. 



Psoc?is novae-scotiae Walk. — La- 



brum rather large and broad, and some- 

 what excavated on the front edge. The 

 epipharynx in front is divided into lobes, 

 the front edge of the middle one of which 

 extends a little farther out than the 

 lateral lobes, and has a straight edge. 

 This lobe bears two rows of short setae, 

 those of the distal or marginal row being 

 shorter and consisting of five or six 

 stouter setae, which are blunt at the tip 

 and have the appearance of having been 

 worn off'. On the basal half in the 

 middle is a large polygonal pilose area. 

 I cannot detect any sense-cups. 



Psocus sp. — In a species from Florida 

 the labrum and epipharynx, with the ar- 

 mature of the latter, are as in the preced- 

 ing species, and there are no sense-cups 

 to be seen. The}^ seem to be wanting 

 in this genus. 



Etitennes ripperti. — In a larval and 

 a winged female from Nassau the la- 

 brum and epipharjaix have the same 

 shape and armature. The end of the 

 labrum is full and round, with no trace 

 of a median suture. The epipharynx is 

 pilose, with a few long tactile setae. 

 On the front edge is a transverse row of 

 six gustatory ( ?) setae, each bristle being 

 acute and arising from a beaker-like 

 base. Along each side of the median 

 line on the anterior half of the epi- 

 pharynx is a group of about 20 scattered 



