the Irish Species of Thysanura. 97 



Sp. 2. ACHORUTES MUSCORUM. 



Plate XII. Fig. 6. 



Body subcylindrical, turned posteriorly, and ending with two mam- 

 millge, dark purplish. Head short triangular ; erjes not remote 

 from the base of the antennae, which are very short, and have 

 the 1st joint very large, the succeeding successively diminish- 

 ing in size ; last acuminate. Legs pale blue. Riiigs with strong 

 spiny hairs in rows along the back; hairs usually arising in pairs. 



Length 0-07 inch. 



At Cranmore, under a rotting stick : it moves verj'- slowly, and 

 cannot leap. 



Fig. 6. Animal magnified. Qa. The antennae. 6 6. Afoot. 



Smynthurus, Latr. 

 Sp. 1. Smynthurus viridis, Fabr. 

 Plate XII. Fig. 7. 

 Head yellow, anteriorly a brown mesial fascia ending in a trans- 

 verse one at the vertex ; posteriorly an irregular, broad trans- 

 verse fascia. Abdomen subglobular, green, a pale mesial line 

 ending in a black anal macula, and having two others contigu- 

 ous, anterior to which is a 4-angular lightish patch, anteriorly 

 bounded by irregular patches, ending in a dark transverse fascia ; 

 laterally dark green, mottled ; near the neck two irregular trans- 

 verse fasciae, interrupted in the middle. Antennas yellow at their 

 base ; apex darker brown. Legs pale brown, with darker coxae. 

 Length 006 inch. 



Common at Cranmore among plum-tree leaves which have fallen 

 to the ground. 



Fig. 7. Animal magnified. la. The mouth. 



Sp. 2. Smynthurus atra, Fabr. 

 I have never seen more than one specimen in Ireland : it appears 

 very common in Britain. 



Sp. 3. Smynthurus signata, Fabr. 

 Plate XII. Fig. 8. 

 Head yellow, transverse, an abbreviated brown mesial fascia ; eyes 

 black. Abdomen greenish yellow, lozenge-shaped, with three 

 triangular brown maculae on the sides behind the middle, their 

 apices directed inwards ; above the anus an intensely black 

 rectangular macula, from about which stands out a tuft of white 

 hairs. Beneath this macula a process separated by a channel, 

 hairy, and having a ferruginous triangle in its middle line. 



