DipJopoda in the British Museum. 249 



lulus pilosus, Newport, Ann. Nat. Hisfc. xiii. p. 267 (1844)=/rt77«.r, 



Meinert, Nat. Tidskr. (3) v. p. 15 (1868), not fallax, Latzel, 



Haase. This species is Leach's terrestris (Liun.), but not the 



terrestris of Linne, Porath, and Stuxberg. 



lulus pilipes, Newport, loc. cit. p. 268 (1844)=/. varlus, Fabr. 



Spec. Ins. i. p. 528 (1781). 

 Sjnrostreptus gracilipes, Newp. loc. cit. p. 269, from the Philippine 

 Islands, is based upon a specimen of Spiroholas, and has been 

 redescribed as Spirobolus juloides by Karsch,Zeitschr. Naturwiss. 

 (3) vi. p. G5. 

 Spiroholus pulvillatus and simillimus, Newport, loc. cit. pp. 268, 269, 

 are synonyms ; the species has been recharacterized as giganteus 

 by Porath, CEfv. Vet.-Ak. Ftirh. 1872, p. 17, and as ligulatus by 

 Voges, Zeitschr. wissen. Zool. 1878, pp. ISO, 181. 

 It is extremely common at Lagos. 

 Spiroholus caudatus, Newport, loc. cit. p. 269, has been redescribed 



as P. la'tus by Karsch, Zeitschr. Naturwissen. (3) vi. p. 70. 

 Spiroholus roseus (Gervais), Ins. Apt. iv. p. 181 (1847), of which a 

 co-type is in the British Museum, has been redescribed as Sp. 

 costulatus hy Porath, Bib. Sv. Yet.-Akad. Handl. iv. no. 7, p. 31. 

 Spirostreptus corculus, Butler, Ann. Mag. Nat. Hist. (5) ix. p. 330 

 (1882), belongs to the same category of species as the other 

 known Madagascar forms. It is based upon young specimens, 

 and may be easily recognized by the two wide longitudinal 

 flavous bands which run throughout the length of the body ; the 

 head is flavous, with a conspicuous black band between the eyes. 

 Loc. Betsileo, Madagascar. 

 Spirostreptus Cowani, Butler, loc. cit. p. 328, is in reality a Spiro- 

 holus (cf. infra). 



Loc. Betsileo (Madagascar). 

 Spirostreptus avernus, Butler (Ann. Mag. Nat. Hist., June 1876, 

 p. 445), from Rodriguez, is a small, slender, luliform species of 

 Spiroholus. There are four labral pores on each side ; the eyes 

 are separated by a space about equal to three times a diameter ; 

 the antennae are very short ; the collum laterally resembles that 

 of a Spirostreptus., extending as low as the second tergite. The 

 posterior half of the tergites is elevated and smooth above ; the 

 median portion is marked irregularly with crescentic impres- 

 sions ; the pores are situated behind the sulcus on the posterior 

 part of the tergites. Scobina absent. The anal tergite is pro- 

 duced into a triangular tail, which overhangs the valves ; 

 valves with margins not compressed. 



Sp.glohulanusoil\.&vsQh, from the Comoro Islands, is very close 

 to this, but appears to differ in the number of labral pores. 

 Spirostreptus sorornus, Butler (ibid.), from Ilodriguez, is a Sjnro- 

 bolus related apparently to Ooesii of Porath, but with the median 

 part of the somites scarcely sculptured above and the copulatory 

 feet of a different form. 



It is closely allied to S. comorensis of Karsch, and to lumhri- 

 cinus of Gerstacker, both of which have been recorded by Karsch 

 from Mayotte. 

 Spirostreptus simidans, Butler {ihid.), from Rodriguez, is based upon 



