the Early Stages o/Paltostoma schineri. 193 



Williston's dried (^ co-type tliej'' appear as minute one- 

 or two-jointed org;ins, only tliere they are uniformly dark, 

 not pale with only the apical pit dark, as is the case in the 

 (perhaps incorapletely-pigmented) pupa. 



Labium (fig. 9, lab.^ very long and nai'row, equalling the 

 labrum and hypopharynx in length ; there is a transverse 

 line of weakness near the base, at which the organ can 

 evidently he bent ; another line of weakness quite close to 

 the apex, proximal to the small short labellar portion ; 

 owing to the apical part of the organ unfortunately being 

 twisted over on to its side, it is impossible to make out 

 whether, or how far, it is divided into two separate labellse. 



[^Mouth-parts of $ . — Some brief remarks on the mouth- 

 paits in this sex are inserted here. Paucity of material has 

 prevented my dissecting these organs in one of the $ $ 

 described below l)y Lamb, and I have only been able to 

 examine them superficially in the dried insect (PI. XI. 

 fig. 17). The proboscis is shorter and much more robust 

 than in the J", and the palpi are elongate, consisting of at 

 least three (perhaps four) joints. Tlie comj)arative shortness 

 and stoutness of the proboscis has been mentioned by Bezzi 

 in his description of i^. bellardii ? (op. cit. 1913, p. 64).] 



1 have dissected and mounted the mouth-parts of a 3" of 

 the South African Kellogyina burnardi, Edwards, for com- 

 parison with those of tlie ^ Paliostoma. In K. barnardi 

 also the parts are much elongated, but not nearly so long 

 and slender as in the PaJfostoma. K. barnardi has the 

 labrum tapering to a fine sharp point ; hypopharynx long 

 and narrow, but much broader in pro})ortion to its length 

 than in the Paltostoma, its edges apparently devoid of hairs, 

 its apex not bifid but coming to a point (fig. 12); maxillae 

 with the lobes rather more pointed at the apex than in 

 Paliostoma, and with the paljii much exceeding the lobes 

 in length, and composed of four joints, the basal one very- 

 elongate, subequal in length to the lobe, the succeeding ones 

 becoming gradually shorter ; labium much shorter and 

 bi-oader in proj)ortion than in Paltostoma. [It may be added 

 that, under a high power, no sign of transverse division or 

 ditferentiation of upper and lower facets could be seen in 

 the eyes of K. barnardi.'] 



There is no direct evidence of the feeding-habits of either 

 sex of Paltostoma. One cannot say what is the reason of 

 the extreme length and slenderness of the parts in the (J . 

 The hypopharynx does not give at all the impression of a 

 piercing organ, but would seem to be suitable for feeding 

 on nectar. There appears to be considerable diversity of 



