244 Transactions. — Zoology. 



Monophlebus crawfordi, var. levis : Female varying in length 

 from fin. to iin. ; colour yellowish-red, with longitu- 

 dinal bands of purple ; antennas of nine joints, of which 

 the last is rather longer than any of the others ; feet 

 only scantily spinous ; epidermis bearing only very few 

 short fine hairs, many circular spinneret -orifices, and 

 great numbers of short subcorneal spinneret-tubes ; no 

 long anal seta. 

 Monophlebus crawfordi, var. pilosior : Female varying in 

 length from ^-in. to fin. ; colour brick-red, with longi- 

 tudinal and transverse bands of brown, giving it a 

 trellis-like appearance dorsally ; antennae of nine joints, 

 the last rather longer than any of the others; feet 

 strongly spinous ; epidermis very thickly clothed with 

 strong hairs, and having only a few circular spinnerets ; 

 a long white seta protrudes from the abdominal ex- 

 tremity. 

 I do not lay any stress upon the differences of size in these 

 varieties ; nor do I think that the variation in colour of the 

 last is sufficient to be specific. Possibly, when the males of 

 var. levis and pilosior may be discovered they may differ so 

 much from the type as to be quite separate ; but they are uot 

 as yet known. 



Monophlebus fuscus, sp. nov. Plate XVIII. , figs. 1-4. 



Adult female brown in colour, elongated, active, distinctly 

 segmented ; length averaging in the specimens seen about 4-in. 

 Antennae short, rather thick, not conical, of seven joints, of 

 which the third is the longest, the rest subequal. Feet with 

 several hairs, but only moderately spinous ; two very short 

 fine digitules. Epidermis bearing many slender hairs, many 

 circular spinneret-orifices, and some short subcorneal spinneret- 

 tubes. 



Larva brown, elongated-oval, flatfish, active ; length about 

 -Jgin. Body covered with numbers of rather thick spiny hairs ; 

 on the margin is a row of short thick tubular spinnerets, each 

 terminating with a thickened edge (probably twelve on each 

 side), and from these spring very long, radiating, slender, glassy 

 threads, which are exceedingly brittle. Antennas slender, of 

 five joints, the last forming a large fusiform club ; all the 

 joints bear hairs, but none of these are very long. Anal 

 tubercles small, setiferous. 



Male unknown. 



Ilab. In Australia, on Eucalyptus sp. My specimens 

 were sent by Mr. Koebele from New South Wales. 



I should have hesitated a long time to consider this as a 

 distinct species, on account of the seven-jointed antenna, 

 which suggested an immature condition, had it not been that 



