1878.] 209 



Teteoxia Beautoist, Fairm., in Thorns. Arcliiv., ii, p. 311, 595. 



0£ this species Dr. Stal (Hem. Af., iii, p. 12G) states, "Exemplum 

 typicum Beawvoisi, anteunis, rostro, abdomine pedibusque destitiitum, 

 in collectioue Signoreti asservatum, descripsi." I liave received one 

 specimen from Isubii, W. Africa, whicli is clearly referable to this 

 species, agreeing on the whole with Fairmaire's description, save in a 

 few particulars of coloration. 



The colour of the prouotum is purplish-black — " d'un roussatre 

 brillaut," Fairm. Femora from near the base to one-half their length, 

 and the apical half of the tibiae, pale yellowish — " base des cuisses et 

 milieu des jambes d'un jaunatre pale," Fairm. All the other characters 

 agree, though it should have been stated that the base of the second 

 joint of the antennae is also blackish. 



OxcocEPHALUs suBSPiNOSus, A. & S., Hist. des Hem., p. 388, 1. 



According to Stal (Hem. Af., iii, p. 159), " Specimen typicum 

 pessime conservatum, hand describendum, misit Signoret, O. annulipedi 

 maxime affinis, sed major, spinulis anticis capitis magis erectis, articulo 

 prime antennarum paullo longiore, &c., &c. Long., 28 ; lat., 4 mill." 



I have examined four specimens, two in my own collection and 



two in the collection of Mr. Horniman, which agree with the above 



description. There are also the following, colour differences. The 



" vittula clavi et vitta oblongo maculaque minuta interioribus ante 



medium corii " of O. annulipes, Stal, are absent in O. suhspinosus. In 



the last named species, the spot on the membrane is less elongate and 



more quadrate. 



Derwent Grove, East Dulwicli : 

 December 2'Qth, 1877. 



ON THE IMPLIED POWER OF STRIDULATIOX IN THE HAIR-STREAK 

 EUTTERFLIES (TRECLA). 



BY A. II. SWINTON. 



Mr. A. R. Wallace, in his paper on the Eutterdies of the Amazon 

 Valley (Trans. Ent. Soc, n.s. ii, p. 263), says, regarding the Tlteclce — 

 Endymion, Ilarsyus, ^tolus, Pholeus, ^c. — " they have a very peculiar 

 habit of moving the two lower wings over each other in opposite 

 directions, giving an appearance of revolving discs," a phenomenon 

 also observed of certain Hair-streaks in the isthmus of Panama by Mr. 

 T. Belt ; who relates (Naturalist in Nicaragua, p. 299), that at the 

 small town of Tierrabona he saw, " on wet muddy places near the 

 stream, groups of butterllies collected to suck the moisture. Among 

 them were some fine Swallow-tails (Pc^j^V/o), quivering their wings as 



