170 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



vol. 40. 



to the last six pairs of legs, with the exception of the sixth pair. It 

 also differs from both genera in having only three segments to the 

 abdomen. It differs further from MacrocJii- 

 ridotea in not having the sides of the head 

 cleft and in having the second article of the 

 peduncle of the first antennae inserted in the 

 outer lateral margin of the basal article. It 

 differs further from Chsetilia in not having 

 the sixth and seventh pairs of legs jointed and 

 in having the sixth pair less elongate. 



The type of the genus is Chiriscus australis, 

 new species. 



CHIRISCUS AUSTRALIS, new species. 



Body ovate, a little more than twice as long 

 as wide, 8 mm. by 3 \ mm. Color, in alcohol, 

 light brown, with a small patch of black on 

 either side of the posterior portion of the 

 head and on either side of the antero-lateral 

 parts of the first thoracic segment ; there is 

 also a transverse band of black on the termi- 

 nal abdominal segment. 



The head is twice as wide as long, 3 mm. 

 by \\ mm., with the anterior margin pro- 

 conspicuous median point. The head is deeply 



Fig. 1. Chiriscus australis 

 X 9. 



duced into a 



immersed in the first thoracic segment, but the lateral parts are pro- 

 duced and expanded in wide plates, the margins of which are entire. 

 The eyes have almost disappeared ; they are 

 situated some distance from the lateral margin 

 in the posterior half of the head. The first 

 pair of antennae have the basal article large 

 and dilated, with the post-lateral margin pro- 

 duced in a small rounded 

 lobe ; the second article is 

 narrow, elongate, about 



one and a half times the length of the first, and 

 is inserted in the outer lateral margin of the 

 basal article; the third article is about as long 

 as the second; the flagellum is composed of a 

 single large article, about half the length of the 

 third article of the peduncle, and a minute ter- 

 minal article. The first antennae extend beyond 

 the post-lateral angles of the head by a distance equal to the length 

 of the flagellum ; the second antennae are extremely short, extending 

 only to the end ol the second article of the peduncle of the first 



Fig. 2. Chiriscus australis. 

 Maxilliped. X 20£. 



Fig. 3. Chiriscus australis. 

 First leg. X IB. 



