293 



THYSANURA. u/>.. 



By Filippo Silvestri (Bevagna, Italy). '^• 



(Plate VIII.) 



No Thysanura have, until now, been known from the Hawaiian islands. The 

 collection of these Insects, that I have studied through the kindness of Dr D. Sharp, 

 comprehends only four species, all new and belonging to the cosmopolitan genera 

 Japyx (i), Machilis (2), and Lepisma (i). The small number of the species does not 

 permit any inference as to the distribution of these interesting Insects, but I hope that 

 the Entomologists of the Hawaiian islands will give more attention to this group, and 

 publish supplementary information on the Hawaiian Thysanura and on their relationship 

 with those of other islands. 



Fam. CAMPODEIUAE. 



Campodea Westw. 



Individuals of this genus are very numerous in the Islands, but Mr Perkins has 

 not been able to preserve any specimens in a state fit for study or identification. He 

 has observed that this Insect is introduced in the earth connected with imported plants. 



Fam. JAPYGIDAE. 

 Iapvx Hal. 



( ' ) J'^Py-'^' sharpi, sp. nov. 



Pallide cremeus, segmento abdominali decimo et forcipe ferrugineis, forcipis mar- 

 ginibus latericiis. 



Antennae sat breves, basi incrassata, apicem versus gradatim magis attenuatae, 

 articulis 38 compositae, articulo singulo latiore quam longiore, setis longis sat robustis et 

 setis sat brevibus instructis, articulo quarto setis tribus sensoriis (PI. VIII. fig. i — 2, 

 s' — s') instructo, articulis quinto et se.xto setis sensoriis quinque (fig. i — 2, s' — s", s" — s") 

 in articulo singulo. Setae sensoriae (fig. 3) valde attenuatae, parte distali plumosa. 



Thorax. Tergita et sternita setis nonnullis longis et setis sparsissimis brevibus 

 instructa. Pedes coxa et trochantere setis nonnullis longis, femore .setis duabus inferis, 

 longioribus et setis superis nonnullis sat brevibus, nee non seta longa, tibia infra setis 

 duabus sat longis, robustis, nee non setis sat brevibus .sat robustis et setis brevibus, tarso 



F. H. III. 3^ 



