586 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



a 



TYLOS LATREILLI Audouin and Savigny. 



TijIoK latreilli Aunouix and SAVIGNY, Descript. de 1'Egypte, 1826, pp. 285-287, 

 pi. xin, fig. 1. 



Tylox armadillo LATKEILLE, Cuvier, Regne Animal, 2d ed., IV, 1829, p. 142. 

 (TI-ERIN, Iconogr. Crust, 1829-1843, p. 35, pi. xxxvi, fig. 4. 



Tylos latreilli MILNE EDWARDS. Hist. Nat. Crust., Ill, 1840, p. 188; Regne anini., 

 Crust, 1849, pi. LXX bis., fig. 2. LUCAS, Expl. d'Alg., I, 1849, p. 73. HEL- 

 LER, Verb. 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, Bermu- 

 das; also Algeria; Tunisie; Odessa. 



Bod>' elliptical in outline, very convex, and able to be contracted 

 in a ball. Surface smooth or minutely 

 granular and setigerous. Color } r ellow 

 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 - laterally . Second 

 pair of antennae, with a 

 five-jointed peduncle and a flagellum 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. 



Antennae interiores uniarticulatse, immobiles. 



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

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



Trunciannulus primus margine lateral! profundesulcato; epimera annulorum duo- 

 rum sequentium parva, rotundata, subtriangula, ante paulum excavata. 



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

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

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

 superans. Pedes anales operculum rotundatum, ante angustatum formantes. 



Color albidus. 



Longitude 13 mm. Latitude 5.5 mm. Altitude 3 mm. BUDDE-LUND, Crust Isop. 

 Terrestria, 1885, pp. 278-279. 



FIG. 646. TYLOS LAT- 

 REILLI. OPERCU- 

 LUM. 



FIG. 647. TYLOS LATREILLI (AFTER 

 DOLLFUS). a, HEAD WITH ANTENNA. 

 6, LAST TWO SEGMENTS OF ABDOMEN. 

 (ENLARGED.) 



