A NEW GENUS OF NEUROPTERA. 445 
genera, as I have said, agree so essentially in general form, and structure of oral and 
intestinal organs, that it seems inevitable they should be referred to one family; while 
Tapyx, at least, differs so much in nearly every one of these particulars from the typical 
Lepismide, that the constitution of a distinct family to receive these two genera suggests 
itself as a ready alternative. It remains to be inquired whether there be not some such 
intermediate links extant as may efface the discrepancy apparent at first sight, and for- 
bid the division. If anywhere, such a link is to be looked for in the genus Nicoletia of 
Gervais*, as to which, unfortunately, our information remains absolutely nil as regards 
intestinal structure. The galeate maxille, well-developed palpi, and triplicate appen- 
dages of the caudal extremity vindicate for this insect a place in the family Lepismide, 
notwithstanding that in its general appearance—bleached and scaleless—it so much 
resembles Campodea. The pectinate inner lobe of the maxilla of Nicoletia and the ven- 
tral appendages of Campodea seem to bring them somewhat closer; and the different 
number of the caudal filaments may perhaps not deserve so much weight as has been 
commonly attributed to that character within the limits of this stirps, when we remem- 
ber how the number varies between two and three among the Ephemeride, a group not 
very distant, perhaps, from the Thysanura. The differences, therefore, which incline me 
to propose the introduction of a new family, intermediate in position between the Lepis- 
mide and Poduride, are so much more pronounced in Japyx, that I must consider it as 
the type, and instead of deriving the family name from the genus longest known, Cam- 
podea, I propose to take it from the typical one, Japyx. Accordingly the family 
TAPYGIDJE, 
in the stirps Thysanura, is distinguished from the two other families between which I 
have placed it by the characters exhibited, antithetically, in the columns of the Table 
following Sistine | 
Fam. PopuRID#. 
Antenne pauciarticulate; vel 
paucis tantum, versus basin, 
discretis ; extremis coarctatis. 
Fam. LEPISMIDÆ. Fam. IAPYGIDE. 
Antenne multiarticulatze, Antennz multiarticulate. 
Maxilla oblonga, apice fissa et 
denticulata. 
Palpi (exarticulati; vel potius) 
obsoleti. 
Prothorax minimus. 
Tarsus brevissimus, aut cum ti- 
bia connatus. 
Unguiculus unicus (vel bini im- 
pares). 
Maxilla integra, falcata, acuta, in- 
tus pectinata. 
Palpi brevissimi; alteruter, aut 
uterque, obsoletus. 
Prothorax minimus. 
Tarsus exarticulatus, oblongus. 
Unguiculi bini pares. 
ست e‏ ت ااا Seri: Saar ae rte‏ ر 
Maxilla biloba, mala exteriore 
subarticulata, galeiformi. 
Palpi quatuor ; maxillares maxilla 
longiores, 
Prothorax magnus. 
Tarsus pluriarticulatus. 
Unguiculi bini pares. 
a e e 
* Nicoletia terrestris, L. 
Lepisma terrestris, L, Fn. S. ii. 1926; S. N, xii. ii. 1012. 
Nicoletia geophila, Gervais, Ann. Soc. Ent. Fr. 1" série, tome xi. p. 48, &c. 
? —— phytophila, ibid. 
VOL. 
