586 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



TYLOS LATREILLI Audouin and Savigny. 



Ti/los latreilli Audouin and Savigny, Descript. de I'Egypte, 1826, pp. 285-287, 

 pi. XIII, fig. 1. 



Tylos armadillo Latreille, Cuvier, Regne Animal, 2d ed., IV, 1829, p. 142. — 

 GuERiN, Iconogr. Crust, 1829-1843, p. 35, pi. xxxvi, fig. 4. 



Tylos latreilli Milne Edwards. Hist. Nat. Crust., Ill, 1840, p. 188; Regne anim.. 

 Crust., 1849, pi. Lxx bis., fig. 2.— Lucas, Expl. d'Alg., I, 1849, p. 73.— Hel- 

 ler, Verh. Zool.-bot. Ver., Wien, XVI, 1866, p. 732.— Miers, Proc. Zool. Soc. 

 Lond., 1877, p. 674. — Budde-Lund, Crust. Isop. Terrestria, 1885, pp. 273- 

 274 (see Budde-Lund for synonymy). — Dollfus, Bull. Soc. d'Etudes Scien- 

 tifiques de Paris, 12th year, 1890, pi. i, fig. 4. 



Tylos armadillo Dollfus, Mem. Soc. Zool. de France, 1896, p. 550. 



Tylos latreilli Richardson, Trans. Conn. Acad. Sciences, XI, 1902, pp. 300-301, 

 pi. XL, fig. 56. 



Localities. — Bermudas; Miami, Florida; Long Bird Island, Berum- 



das; also Algeria; Tunisie; Odessa. 



Body elliptical in outline, very convex, and able to be contracted 



in a ball. Surface smooth or minutely 



granular and setigerous. Color yellow 

 or light brown, marked 

 with black spots. 



Head with front not 

 marginate; lateral angu- 

 lations produced into 

 lobes, which are trun- 

 cate. Epistome forming 

 a triangular shield, ad- 

 vancing some distance 

 beyond the surface of 

 the head. Eyes situated 

 post-laterall}'. Second 

 pair of antenna^, with a 



five-jointed peduncle and a tiagellum consisting of four joints, extend 



to the posterior margin of the second thoracic segment. 



The seven thoracic segments are subequal. The epimera of the first 



segment are represented by a thickening of the lateral edge, which is 



incised or cleft posteriorly. The epimera of all the other segments are 



dorsally separated by distinct suture lines. 



Antennie interiores uniarticulatpe, immobiles. 



Fronsab epistomate non discreta; epistomatis scutellum subtetragonem, ante aiigu- 

 statum, reflexum; clypeus ampins, tetragonus, tranverse paulum impressus. 



Trunciannulus primus margine laterali profundesulcato; epimera annulorum duo- 

 rum sequentium parva, rotundata, subtriaugula, ante i)aulum excavata. 



Caudpe annulus quintus processubus inferioribus validis; tetragonis, medio attin- 

 gentibus; annulus quartus processubus parvis, oblongis, angustis; annulus tertius 

 epimeris minutis; annulus analis convexus, epimera annuli prjeanalis parallela satis 

 superans. Pedes anales operculum rotundatnm, ante angustatum formantes. 



Color albidus. 



Longitudo 13 mm. Latitudo 5.5 mm. Altitudo 3 mm. — Budde-Lund, C'rust. Isop. 

 Terrestria, 1885, pp. 278-279. 



Tylos lat- 



O P E RC r - 



Fig. 647.— Tylos latreilli (After 

 Dollfus). o, Head with antenna. 

 h, Last two segments of abdomen. 



(Enlarged.) 



