DESCRIPTION OF A NEW TERRESTRIAL ISOPOD FROM 



GUATEMALA. 



By Harriet Richardson, 



Collaborator, Division of Marine Invertebrates, U. S. National Museum. 



The isopod to be described resembles in general appearance and in 

 its*spiny armature the form described by Kinahan, from Jamaica, as 

 Acanthoniscus spiniger. Notwithstanding the striking superficial 

 similarity of the two species, they can not be referred to the same 

 genus. 



Body covered with long spines. Head wider than long; eyes 

 distinct. 



Second pair of antennae with a nagellum composed of two articles, 

 the first being very short. 



Thorax with no epimera distinctly separated from the segments 

 either above or on the under side. 



Abdomen with the terminal segment triangular, ending posteriorly 

 in an acute apical point. 



Uropoda with the basal article or peduncle wider than long, situ- 

 ated somewhat obliquely; the inner branch is inserted at the inner 

 post-lateral angle of the basal article; the outer branch is short, 

 hidden in a dorsal view, and does not reach the tip of the terminal 

 abdominal segment. 



The type of the genus is Globarmadillo armatus, new species. 



Body contractile, capable of being rolled up into a ball. Surface 

 covered with long spines. 



Head broader than long, with the front slightly excavate and the 

 antero-lateral angles acutely produced. There are six long spines 

 on the head, two just back of the anterior margin, close together, 

 one on either side of the median line, and four on the posterior half 

 of the head between the eyes, two on either side of the median line, 



Family ARMADILLIDID^E. 

 GLOBARMADILLO, new genus.^- 



GLOB ARMADILLO ARMATUS, new species. 



Proceedings U. S. National Museum, Vol. 37— No. 1718. 



495 



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