338 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



vol. 44. 



PENTONISCUS PRUINOSUS, new species. 



Body oblong-ovate, 4 mm, long and 1 J mm. wide. Color reddish- 

 brown with wavy lines of yellow on either side of the median line. 



Head wider than long, with the front not margined. Antero- 

 lateral lobes small; front slightly produced in the middle in a widely 

 rounded lobe. Eyes very small, black, and situated about the 

 middle of the lateral margin. The second antennas have the first 

 article short, the second and third subequal, and each a little longer 

 than the first ; the fourth is one and a half times 

 longer than the third; the fifth is a little longer 

 than the fourth. The flagellum consists of five 

 articles, the third and fourth being rather indis- 

 tinctly separated, and a long terminal spine equal 

 in length to the flagellum. 



The first segment of the thorax is a little longer 

 than any of the 

 following seg- 

 ments, which are 

 subequal. The 

 post - lateral an- 

 gles of the last 

 three segments 

 are produced 

 backward; those 



Fig. 2. 



PENTONISCUS PRUINOSUS. SECOND 

 ANTENNA. 



Fig. 1.— PENTONISCUS 

 PRUINOSUS. 



of the first four segments are rounded. 



The abdomen is abruptly narrower than the thorax. The lateral 

 parts of the first two segments are concealed by the seventh thoracic 



U 



Fig. 3.— Penton- 

 iscus PRUINO- 

 SUS. Maxilli- 



PED. 



Fig. 4.— Penton- 

 iscus PRUINO- 

 SUS. Inner la- 

 mella of sec- 

 ond MAXILLA. 



Fig. 5.— Penton- 

 iscus PRUINO- 

 SUS. Mandi- 

 ble. 



segment. The post-lateral angles of the three following segments are 

 produced backward in very acute angles. The first segment is a lit- 

 tle shorter than any of the others, which are subequal. The sixth or 

 terminal segment is triangular, with the apex rounded. The pedun- 

 cle of the uropoda extends almost to the extremity of the terminal 



