292 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



307. — EXOSPH.EROiM A FAXON I. 

 ^. ]0. 



EXOSPHiEROMA FAXONI, new species. 



Body ovate, nearly twice as long as wide, 2^ nmi. :5i mm. 

 Head twice as wide as long, 1 mm. :2 mm., with the anterior margin 

 rounded and produced in a small median point. There is a marginal 



border extending across the anterior portion 

 of the head as far as the second article of 

 the first antenna on either side. Eyes small, 

 round, composite and situated in the post- 

 lateral angles of the head. The first pair of 

 antenn{\? have the first article long and stout; 

 the second article is half as long a.s the first; 

 the third is one and a half times as long as 

 the second. The fiagellum is composed of 

 twelve articles and extends to the post- 

 lateral angle of the first thoracic segment. 

 The second pair of antenna' have the first 

 article short and almost inconspicuous; the 

 second article is about twice as long as the 

 first; the third is about one and a half times 

 as long as the second; the fourth is one and 

 a half times as long as the third; the fifth is one and a half times as 

 long as the fourth. The flagellum is composed of twelve articles and 

 extends a little be3'ond the flagellum of the first pair of antenna^. 



The first segment of the thorax is a little longer than any of the 

 others, which are subequal. The post-lateral angles of the first seg- 

 ment are produced backward in a long process on either side, extend 

 ing to the posterior margin of the second thoracic segment and having 

 the extremities truncate. These processes extend laterally some dis- 

 tance l)eyond the lateral margins 

 of the second segment. The fol- 

 lowing six segments have the epi- 

 mei'a separated by faint lines 

 from the segments and produced 

 in acute points directed later- 

 ally. Those of the fifth seg- 

 ment extend laterally some dis- 

 tance beyond those of the other 

 segments. 



The abdomen is composed of 

 two segments. The first segment 

 is twice as long as the last thoracic segment and has two small tul)ercles 

 on the posterior margin, one on either side of the median line. Lateral 

 to these the posterior margin is produced backward in a small point on 

 either side. There are three suture lines on eithei- side of this seg- 



FlG. 308.— EXOSPH^ROMA FAXOM. a, MaXILLIPED. 



X 5l|. /), Frontal lamina, x 27^. c. Second 



MA.XILLA. X 51|. 



