ISOrODS OF NORTH AMERICA. 



211 



the fouvtli is a little longer than the third; the tifth is one and a half 

 times longer than the fourth. The tiagelluni is composed of twelve 

 articles. Thc^ second antennse extend to the posterior margin of the 



second thoracic segment. The frontal 

 ^ lamina is small and almost inconspicuous, 



triangular in shape at the base, which is 

 \-ent rally placed. The maxillipcd has a 

 palp of two articles. 



The first, fourth, tifth, and sixth seg- 

 ments of the thorax are a littl(> longer 

 than the others. The epimera are distinct 

 on all the segments but the first. They 

 are narrow plat(\s with the posterior an- 

 gles increasingly acute. The epimera of 

 the last segment an» pi-oduced beyond the 

 posterior margin of the segment. 



The first segment of 

 the abdomen is almost 



entirely concealed by 

 ; thoracic seg- 

 ment. The lateral 



Fig. 214.— Rocinela aries 

 (After Schkedte and 

 Meinerj). Young. (En- 

 larged.) 



Fig. 'ilo.— Rocinela aries (After 



SCHICEDTE AND MEINERT). «, 



Frontal margin, antenn.k and the last thoracic SCg- 



FRONTAL E A M I N .K. b, A D U L T 



FEMALE. (Enlarged.) 



parts are not sepa- 

 rated from the doi-sal portion. The sixth or ter- 

 minal segment is rounded posteriorly. The base 



of the terminal seg- 

 ment is marked with 

 three longitudinal 

 black lines, one on 

 either side of a me- 

 dian line, and two 



oblique lines, one on either side, and all five 

 connected at the base. The outer branch 

 of the uropoda is shorter than the inner 

 branch and half as wide. The inner branch 

 is obliquely truncate, with rounded an- 

 gles. The outer branch is posteri(jrly 

 rounded. The peduncle of the uropoda is 

 as long as the outer l^ranch. The margins 

 of the uropoda and the terminal segment are furnished with spines. 



The first thi'ce pairs of legs are prehensile, the hist four paii's ambu- 

 latory. The merus of all three anterior legs is furnished with two 

 spines, the carpus with one spine, and the propodus of the second and 

 third with one spine. The ambulatory legs are beset with a few spines." 



Fig. 215.— Rocinela aries. a, Max- 

 iLLiPED. X 38i. 6, Leg of second 



PAIR. X lU. 



« For description of the young of the first stage, see Schioedte and Meinert, Nat. 

 Tidsskr. (3), XII, 1879-80, pp. 402-403. 



