82 



N. H. SWELLENGREBEL AND J. M. H. SWELLENGREBEL DE GRAAF. 



The larvae described here, were full-grown, the pupal hairs already showing 

 through the integument of the 1st abdominal segment. 



Breeds in the same places as the foregoing variety, but was only foand in New 

 Guinea (Kokas, Kaimana, May 1919). 



4. Myzorhynchus barbirostris var. pallidus, nov. 



Adult hke M. barbirostris. 



The relation of this variety to its type is the same as that of M. peditaeniatus, 

 Leic, to M. sinensis, viz., the larvae differ from the typical ones by the external 

 clypeal hairs bearing a smaller number of branches (11-22 against 60 or more in 

 the type) (fig. 5). 



Fig. 5. Larva of 3Iyzorhynchu8 barbirostris 

 var. jpallidus, right half of clypeus. 



Breeds in slowly running water, in springs in the jungle and in rice-fields, but 

 always in hilly country. It is rare in Java and Sumatra ; in the AustraUan portion 

 of the Archipelago it is as common as the typical form. 



II. Larvae of known Species not yet or incompletely described. 



1. Myzorhynchus albotaeniatus (fig. 6). 



Length 5-5*5 mm. Colour dark rusty brown, lighter on dorsum of 3rd abdominal 

 segment, less conspicuously so on the 6th, the 4th almost black. Antennae more 

 stumpy than in M. sinensis, length : breadth : : 1 : 4 (1 : 5 in sinensis) ; a branched 

 hair on antennae, its stem half the length of the hair (in sinensis \-\), the branches 

 emitted nearly at right angles (in sinensis at very sharp angles). Median clypeal 

 pairs simple, nude, the distance between them equal to that separating them from 

 the external clypeal hairs (close together in sinensis) ; external clypeal hairs with 

 18-24 terminal branches ; posterior clypeal hairs short, with 3 branches ; occipital 

 hairs with 6-7 branches. Internal shoulder hair very small, with 2-3 short apical 

 branches. Small fans with 12-16 non-serrate leaflets on thorax and abdominal 

 segments i-ii ; complete fans on segments iii-vii ; leaflets as in M. sinensis. 



