the Irish Species of Thysanura, 93 



Sp. 1. Orchesella filicornis. 

 Plate XI. Fig. 2. 



Head globular, a little flattened at the sides, black, a brownish 

 patch posteriorly on the vertex and towards the neck. First 

 4 joints of the antennae with black bases and white tips ; 5th 

 dark brown towards the apex, remaining joints pale, long, sub- 

 equal, with minute hairs. Thoracic rings very hairy or spiny, 

 especially towards the neck, including between the brownish 

 green centres and the black margins irregular white maculae. 

 Abdominal rings not as hairy as the preceding; 1st pale green- 

 ish posteriorly, edges black, and parallel black lines at the an- 

 terior angles ; 2nd jet black, except at the extreme lateral 

 margins, and a narrow pale line posteriorly ; 3rd pale, with a 

 black square macula and two included white specks ; 4th black, 

 a triangular green space posteriorly, last ring green. Legs pale 

 greenish, annulated with black. 



Length 0'16 inch. 



Common at Cranmore. 



The young have the maculae brownish, and often interrupted. 

 Fig. 2. Insect magnified. 2 a. Left antenna. 



Sp. 2. Orchesella cincta (vaga, Fab.?). 

 Plate XI. Fig. 3. 



Head globular, proportionably larger than in the preceding spe- 

 cies ; 1st, 2nd, and 3rd joints of the antennce dark brown at the 

 base, white at the apex ; 4th intensely black, remaining joints 

 reddish brown basally, with minute white apices. Thoracic 

 rings intensely black, inclosing on each side an irregular longi- 

 tudinal pale greenish patch. 1st abdominal ring pale greenish 

 at the base, white at the apex, not so dilated as in the preceding 

 species ; 2nd and following 7-ings intensely black, shining ; fork 

 white. Legs pale, annulated with brown. 



Length 015 inch. 



A few specimens at Cranmore. 



Fig. 3. Insect magnified. 



PoDURA, Linn. 

 Antennce 4- or 5-jointed, longer than the head; forlt developed. 



Sp. 1. PoDURA PLUMBEA, Linn. 

 Plate XL Fig. 4. 

 Body elongate cylindric, thickly covered with purpKsh-blue scales. 



