i>oo :\ri. II. s.-.)it on 



Ajfinifirs of Jmaf/o. — 'l\\c wiitor has no special knowledge 

 of the imago Hies, and will only remark very briefly nnder 

 this head. Pallostoina and 7v'<7/o^/////a are considered closely 

 allied : Bezzi, referring [op. cit. 1913, p. Go) to the shortness 

 of the proboscis in the ? of Paltostoma, states that this 

 renders the distinction of the two genera very uncertain. 

 Hnt in the ($ sex surely the form of the month-parts, even 

 of the j)al|)i alone, would distinguish the genus Paltostoma'^ 

 The i)alpi being, as shown al)ove, very sliort and at most 

 XJ-jointed in Paltostoma ^7, while they are long and 4-jointed 

 in Kellnyyina (^ . Osten-Sacken {op. cit. p. 1G7) remarked 

 that Kelluggina ( = Snoivia) appeared to be closely allied to 

 Paltostoma, but that it had a shorter proboscis and fully- 

 developed palpi. 



YIJI. Summary. 



1. Paltostoma schineri was described from the cJ sex 

 only, from St. \'ineent. ? $ , larvai, and pupte have now 

 been found in Trinidad, and are described here for the first 

 time. 



2. The larva has short 2-joiuted anteunse ; dorsal surface 

 spinose ; branchial filaments arranged in tufts ; lateral pro- 

 cesses simple, pediiorm, ciliatc, without long setae ; sixth 

 segment with only one pair of lateral processes. 



3. In the full-grown larva there are ten branchial fila- 

 ments, arising in five pairs, in each tuft. In the half-grown 

 larva the number is much less. A similar increase during 

 growth has been observed in Liponeiira. 



4. The larvffi and pupaj described as those of the South- 

 African Kelloyyina barnardi do actually belong to that 

 species, in spite of douljts expressed on this point. The 

 larvae of Kelloyyina and Paltostoma have a number of points 

 of resemblance, and both ditier from Curupira in the 

 arranfrement of the branchial filaments. But in the posses- 

 sion of dorsal spines Paltostoma a])proaches Curupira. 



5. The pupa of Paltostoma schineri is characterized by the 

 large number of erect spiniform hairs on its dorsal surface. 



G. The mouth-parts of (^ Paltostoma conform to the 

 general Blepharocerid type, but are characterized by extreme 

 length and slenderness of labrum, hypopharynx, and labium, 

 and by extreme reduction of the palpi, which are minute 

 and at most 2-j<unted. The ? has a mucli shorter, stouter 

 proboscis, and ])alpi normally developed. 



