214 BULLETIN 58, UNITED STATES NATIONAL MUSEUM. 



1834. Euprepes Wi'EGMA'Nyi, Hcrpet. Mex., p. 36 (emendation). 

 1845. Mabouya Gray, Cat. Liz. Bi-it. Mus., p. 93 (emendation). 

 18G2. Mnbuia Cope, Proc. Phila. Acad., 1862, p. 185 (emendation). 



With reference to the names cited in the above synonymy it is true 

 that Spondylurus occurs before Mahuya, but of two names having 

 the same date that one selected by the reviser is to be retained. 

 Mahuya has been so selected, not only by the first reviser, but by all 

 subsequent authors. This rule is a direct application of article 28 of 

 the International Rules of Zoological Nomenclature. 



MABUYA LONGICAUDATA" (Hallowell). 

 Plate XVI. 



1856. Euprepis longicaitdata Hallowell, Trans. Amer. Philos. Soc. (2), XI, p. 77, 



pi. IV, fig. 1 {Euprepcs on plate] (type-locality, Siam; type in Mus. Phila. 



Acad.; Doctor Ruschenberger, collector). — Mabuia longicaudata Bou- 



LENGER, Cat. Liz. Brit. Mus., Ill, 1887, p. 189. 

 1864. Eumeces siamcnsis Guenther, Rept. Brit. India, p. 91 (type-locality, Siam; 



type in Brit. Mus.). — Mabuia siarnensis Boulenger, Cat. Liz. Brit. Mus., 



Ill, 1887, p. 188 (Siam; Hainan). 

 1867. Euprepes ( Tiliqua) bicarinatus Peters, Mon. Ber. Berlin Akad. Wiss., 1867, 



p. 22 (type-locality, Hongkong; type in Berlin Mus.; Jagor, collector). — 



Tiliqua bicarinata Mueller, Verb. Naturf. Ges. Basel, VIII, Pt. 2, 1887, 



p. 287 (South Formosa). 

 1886. Euprepes ( Tiliqua) ruhstrati Fischer, Alih. Naturw. Ver. Haml)urg, IX, no. 6, 



p. 7, pi. I, figs. 2a-db (type-locality. South Formosa; type in Oldenburg 



Mus.; Ruhstraht, collector). 



It turns out, as has long been suspected, that Guenther's Eumeces 

 siamensis is the same as Hallowell' s Euprepis longicaudata, described 

 eight years earlier, both from Siam. The separation of the two 

 was undoubtedly due to Hallowell's description, which states that 

 the lower eyelid is "scaly with a transparent disc." Mr. James A. G. 

 Rehn, of the Philadelphia Academy Museum, whom I requested to 

 examine the type for me, WTites to the contrary: "The lower eyelid 

 of the type of Euprepis longicaudata appears to have a series of four 

 subquadrate scales of rather large size, surrounded by much smaller 

 scales." This removes any doubt concerning the identity of the 

 alleged two species. 



There being no specimens of this species accessible to me, I have 

 translated and condensed Doctor Fischer's original description of the 

 t^^pe of Tiliqua ruhstrati from Formosa. The identity of the latter 

 with the Siamese species is on the authority of Doctor Boidenger. 



Description of type specimen. — Adult; Oldenburg Museiun; South 

 Formosa; Ruhstrat, collector. — Lower eyelid with a row of four to five 

 large quadrangular scales in the middle; the azygos internasal some- 

 what broader than long, barely touching the rostral and widely sepa- 



" Signifying Long-tailed. & Reproduced in this work as Plate XVI. 



