SIR JOHN LUBBOCK ON THYSANURA. 281 
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S. LUTEUS, mihi. 
This species also was abundant. Yet it seems to have been overlooked by Nicolet. 
Perhaps he took it for the young form of S. viridis. : 
I also met with a very pretty little species of Smynthurus, which differs from any 
of Nicolet's species. It is white, with two broad transverse purple bands, one occu- 
pying the whole of the front part of the body, the other occupying the middle of 
the abdomen; the antennæ are yellow, and connected at the base by a line of yellow 
passing into purple; the eyes are on a black patch, and behind each is a purplish band ; 
underneath, the body is altogether white, with two opaque round spots on each side of 
the spring. This pretty species cannot be confounded with any other; the dorsal surface 
is divided into five subequal parts—the first, third, and fifth being white, the second and 
fourth purple, or to the naked eye black. 
I hesitate, however, to describe it as a distinct species, because in the form of the 
antennee, the feet, and the spring it so very closely resembles S. luteus, from which, on 
the contrary, it differs so much in colouring. 
PAPIRIUS. 
I found three species of this genus namely, P. cursor mihi, P. Saundersii mihi, and 
P. nigromaculatus. As far as colouring goes, these three species agree very closely with 
the three species named respectively by Nicolet Smynthurus fuscus, Smynthurus ornatus, 
and Smynthurus Coulonii. In all these cases, however, he distinctly figures the antennæ 
as having the characters of Smynthurus. It would therefore be very desirable to 
ascertain whether there are really any species of the true genus Smynthurus answering 
to Nicolet's description, or whether perhaps he omitted to notice the difference in the 
antenna. 
MACHILIS POLYPODA. 
Lepisma polypoda Linn. Syst. Nat. ii. 1012; Fabr. Ent. Syst. p. 62. 
Machilis brevicornis Latr. Nouv. Ann. Mus. 1. 79. 
Forbicina polypoda 'Temp. 'Trans. Ent. Soc. vol. i. p. 92. 
Machilis polypoda Gervais, Hist. Nat. Ins. Apt. vol. iii. p. 448; Nicolet, Ann. Soc. Ent. France, 1847, 
p. 345 
Brown, with metallic reflexions. 
Length 3 an inch, 
Woods and dry places. 
I have only met with one specimen of this species. In Ireland, according to Temple- 
ton, it is very common. The head is small; the thorax is not distinct from the abdomen; 
the prothorax cylindrical; the mesothorax is enlarged and elevated; the metathorax is 
less raised, short and broad. 
The abdomen is 10-jointed and tapers gradually backwards. 
- The eyes are large, compound, black, and meet in the middle line. 
The antennæ are shorter than the body, but in my specimen were imperfect at the 
ends; they differed, however, considerably from Templeton's figure 1c. The terminal 
2P2 
