244 PERCY SLADEN TRUST EXPEDITION 



comparison. The specimens obtained by the Percy Sladen Trust Expedition belong to 

 two forms of the species. 



A. subsp. trilunaris, Klug. 



Cicindela trihinaris Klug, Ins. Madag., Abb. Ak. Wiss. Berlin, 1832, i. p. 120, PI. 1, 

 fig. 1. 



Cicindela congrua Klug, Monatsb. Berlin Ak., 1853, p. 245. 



Cicindela trilunaris var. aldabrica Kolbe, Abh. Senckeub. Ges., xxvi. 1902, p. 571. 



A series of over 40 $ and over 30 $, all except 1 from Aldabra. Length varies from 

 9| — 12 J mm. There is much variation in the exact form of the white markings on the 

 elytra ; in only few specimens is the transverse line completely separated from the 

 posterior discoidal spot ; in many the end of the line and the anterior part of the spot are 

 drawn out so that they almost meet ; and in many specimens they are completely united. 

 In the single specimen [$) from Assumption, the line and spot are quite separate, as is 

 also the case in 3 specimens which Dr Horn sent me for comparison, 2 from Madagascar 

 and 1 from German East Africa. 



Log. Aldabra: Takamaka, XL — XII. 1908; Mr Fryer informed me that this 

 Cicindela swarmed at the end of November, and that specimens came to the lamp and 

 caught other insects which had been atti-acted : it was previously obtained in Aldabra by 

 Voeltzkow, etc. Assumption: 1 $, 1910 (Dupont). Madagascar, East Africa. 



B. var. seychellensis, nov. 



= tenuilineata Alluaud [nee W. Horn), Liste Coldopt., p. 9. 



var. oculis valde prorainentibus, prothorace brevi ; colore et sculptura capitis protho- 

 racisque subsp. trilunari affinis, sed prothorace distincte breviore distinguenda. Long, 

 corp. 9^ — 12 mm. 



9 ^, 11 ?. Dr Horn tells me that this does not correspond exactly with any 

 described form of the species. Its eyes are more prominent than those of any other form. 

 The sculpture of the head and prothorax is very similar to that of trilunaris Klug, and 

 (as Dr Horn informs me) almost identical with that of var. perplexa Dejean : that is to 

 say, it is considerably smoother than that of the true C. melancholica. The prothorax is 

 distinctly shorter and proportionately broader than that of trilunaris. In the series 

 before me, although the superficial resemblance between the two forms is considerable, 

 this distinguishing character in the form of the prothorax is constant. According to 

 Dr Horn, the var. ^jerp^ea^a sometimes has the prothorax of about the same shape as that 

 of var. seychellensis. The colour of seychellensis is very similar to that of trilunaris ; a 

 coppery-brown, with metallic green on parts of the head and the margins of the prothorax 

 and in the punctures of the elytra. There is some variation in the white markings on the 

 elytra ; in none of the specimens before me is the transverse line joined to the posterior 

 discoidal spot. In addition to specimens from Seychelles, I refer to this variety one 

 specimen from Farquhar Atoll, which is about 460 miles to the South and relatively 

 near the range of subsp. trilunaris. 



Alluaud, in his List of Madagascar Coleoptera (p. 9), records the form tenuilineata 

 W. Horn as having been found by him in Praslin : but Dr Horn tells me that what was 



