ISOFODS OF NORTH AMERICA. 629 



The surface of the body is slightly granulated. In color the pos- 

 terior and lateral margins are a uniform reddish brown. The other 

 parts are a lighter color, formed of reddish brown with wavy lines of 

 a light yellow on either side of the median line. 



METOPONORTHUS SEXFASCIATUS (Koch). 



fPorcellio sexfasciatus KOCH, System der Myriapoden mit den Verzeichnissen und 

 Berichtigungen zu Deutschlands Crustaceen, etc., 1847, p. 208, pi. vm, fig. 99. 



Metoponorthus sexfaciatus BUDDE-LUND, Crust. Isop. Terrestria, 1885, pp. 167-168. 

 DOLLFUS, Bull. Soc. d'Etudes Scientiflques de Paris, 12th year, 1890, p. 

 4. RICHARDSON, Trans. Conn. Acad. Sciences, XI, 1902, p. 302. 



Localities. Bermudas (Dollfus); also Mediterranean and Canaries, 

 Madeira, Azores, Spain, France, and Algeria. 



Body oblong or oblong-ovate, slightly convex, finely but manifestly 

 covered with transverse series of granules. The segments of the 

 thorax each with a raised transverse line. 



Inner face of the mandibles with three or four plumose processes. 

 The second pair of antennae are a little longer than half the length of 

 the body; the fourth and fifth articles are sulcate; the first article of the 

 flagellum is a little longer than the other. The antero-lateral lobes of the 

 head are bent downward, very small, subrectangular; the median lobe 

 is wanting, the frontal margin straight in the middle or a little produced; 

 the transverse line of the epistome is acutely sinuated in the middle, 

 terminating on both sides far from the frontal margin. The abdomen 

 is less abruptly narrower than the thorax; the terminal segment is 

 short, subtriangular, with the sides incurved, the apex acute and a lit- 

 tle excavate above; the outer branches of the uropoda rather long. 



Color yellow or brown, or dark black, covered with obscure or yel- 

 low spots in from four to six longitudinal series, the first two series 

 being lateral. The epistome is black. The epimera of the thoracic 

 segments have a minute shining tubercle. The ventral side and the 

 legs are yellow; the coxae are spotted with black. Length 10-12 mm. 

 Width 3, 5 mm. to 4, 5 mm. Height 1, 8 mm. to 2 mm. a 



The above description is adapted from the following one of Budde-Lund's: 



Oblongus vel oblonge ovatus, leviter convexus, tenuiter et sparse sed manifesto 

 transverse subseriatim granulatus. Trunci annuli linea elevata transversa. 



Mala interior mandibularum penicillis 3-4. 



Antennae exteriores corporig diniidio paulo longiores; articuli 4-5 sulcati; flagelli 

 articulus prior altero paulo longior. 



Lobi frontales laterales deflexi, minimi, subrectanguli; lobus medius nullus, 

 linea marginalis medio recta vel paulum producta; epistomatis linea transversa 

 inedio acutius sinuata, utrinque procul a margine frontali desinens. Cauda trunco 

 minus abrupte angustior; annulus analis brevis, subtriangulus, lateribus incurvis, 

 apice acuto, supra paulum excavatus; rami exteriores pedum analium sat longi. 



Color flavus vel brunneus, vel e nigro fuscus, maculis vel obscuris vel flavescen- 

 tibus in series longitudinales 4-6, imprimis duas laterales, digestis. Epistoma sub- 

 nigrum. Epimera trunci annulorum tuberculo perlucente minuto. Venter et pedes 

 flava; coxae nigromaculatae. 



Longitude 10-12 mm., latitude 3, 5-4, 5 mm., altitude 1, 8-2 mm. BUDDE- 

 LUND, Crust. Isop. Terrestria, 1885, pp. 167-168. 



