5° 



NORTH AMERICAN ANOPLURA 



poral angles sharp and very prominent. Temporal margins nearly 

 straight, diverging very slightly for a short distance, then converging to 

 form the occiput. Occipital margin straight. Temporal margins with 

 one short, stout spine, followed by two long stout hairs. A transverse 

 row of six long spines across the occiput, with a median pair of short, 

 stout spines. A distinct transverse row of six or eight very short, blunt 

 spines just within the anterior margin, and numerous spines rather ir- 

 regularly arranged about the head. 



Fig. 18. — Antarctophthirus monachus n. sp. ; ventral side of thorax. 



Antennae five-segmented, set very close to the anterior margin ; the 

 first segment large, the second slightly narrower but about as long, the 

 remainder successively shorter and narrower. Under side of the head 

 with a raised median portion bearing numerous short, slender hairs, with 

 a thick fringe of long, slender hairs about the lateral and posterior mar- 

 gins. Rostrum very short, close to the anterior margin. 



Thorax only slightly wider and somewhat longer than the head, not 

 widening posteriorly, entirely free from scales. Anterior margin with 

 a slight V-shaped notch, the posterior margin nearly straight. Mesotho- 

 rax with a median area bearing many short, blunt spines and rather long 

 hairs, and with numerous spines and hairs along the lateral margins. 

 Metathorax with an irregular, transverse row of eight to twelve stout 

 hairs and several smaller ones. Legs very large and stout, the middle and 

 posterior pair of nearly the same size, the anterior pair much smaller. 

 No distinct sternal plate, the space between the coxae bearing many slen- 

 der, irregularly arranged hairs, of which those at the posterior margin 

 are longer and stouter than the remainder. 



Abdomen elongated oval, slightly pointed posteriorly. First to third 



