4 George A. Schultz 



be carefully examined with a binocular microscope. The length of a 

 large specimen is recorded with the discussion of each species, and a line 

 representing 1 mm is present at the lower left of each illustration. With 

 the key one should be able to identify all sexually mature and larger 

 specimens of each species in North Carolina. 



More than eight, or many flagellar articles on antenna 2; 



uropods long and thin 2 



Flagellar article number four, three, two or indistinct; uro- 

 pods inconspicuous or relatively short 4 



Many flagellar articles (gray) Ligia exotica 



Eight to 1 5 flagellar articles (brown) 3 



With lateral process on apex of endopod of male pleopod 2 



(Fig. 19) Ligidium blueridgensis 



With apex of endopod of male pleopod 2 rounded (Fig. 18) 



or squarish (Fig. 20) Ligidium elrodii 



Eye of many ocelli 9 



Eye of one ocellus or three ocelli 5 



Eye of one ocellus 6 



Eye of three ocelli (reddish) Trichoniscus pusillus 



With body pigment; body surface dull with tiny bumps or 



body surface shiny 7 



Without body pigment; body surface strongly tuberculate 



Haplophthalmus danicus 



Body surface dull with many tiny bumps; four inconspicuous 



flagellar articles (salmon red) 8 



Body surface shiny; five or more inconspicuous flagellar 



articles (burgundy red) Hyloniscus riparius 



Exopod of male pleopod 1 elongate, ending in point; tip of 



endopod long and round (Fig. 15) 



Miktoniscus halophilus 

 8b. Exopod of male pleopod 1 short; apex produced into small 



process; tip of endopod long and flattened (Fig. 14) 



Miktoniscus medcofi 



9a (4). Two flagellar articles on antenna 2 12 



9b. Four or three flagellar articles on antenna 2 10 



10a (9). Three flagellar articles; moderately large specimen 11 



10b. Four flagellar articles; small elliptical specimen 



Armadilloniscus ellipticus 



1 la (10). Body broad, elliptical; epimeres long Oniscus asellus 



1 lb. Body narrow, posterior (abdomen) abruptly narrower than 



anterior part; epimeres short Philoscia vittata 



12a (9). Uropods extend past posterior body margin; some roll into 



ball 14 



12b. Uropods contained within general margin of body; roll into 



ball 13 



13a (12) With broad projection or "shelf on anterior margin of head 

 (Fig. 30) (gray) Armadillidium nasatum 



la. 



lb. 



2a (1) 

 2b. 

 3a (2) 



3b. 



4a (1) 

 4b. 

 5a (4) 

 5b. 

 6a (5). 



6b. 



7a (6). 



7b. 



8a (7). 



