366 



Transactions. 



compressed ; middle of posterior margin projecting slightly on to abdomen ; 

 evenly chitinized, mid-lateral parts more deeply coloured ; median inter- 

 ruption continuous with that of prothorax ; a long hair at posterior angle, 

 and inwards from it a group of 3 pustulated hairs. 



Abdomen of 10 segments, narrow, elongate, sides subparallel ; gradually 

 increasing in width to 6th segment, then sharply tapering to 10th, which is 

 slightly bilobed ; all evenly chitinized, with median interruption as in 

 thorax extending through 8 segments ; 9th completely chitinized ; 10th 

 with chitinous lateral blotches ; 2 pairs of small hairs 



on posterior margin of each segment, and a large pair 



of ventral hairs, one on each side of the mid-line ; on 



1st segment 6 other small hairs, 4 of which are near 



anterior border ; one hair at posterior angle in seg- 

 ments 2 to 4 two in 5 and 6, three in 7th, one in 



8th and 9th ; on segments 9 and 10 a pair of dorsal 



hairs. 



Length, 1-76 mm. ; breadth, 0-28 mm. Head, 0-44 mm. 



by 0-28 "mm. 



Three females taken by one of us from a skin of 



Oestrelata neglecta Schl. forwarded to Mr. A. F. Basset 



Hull, of Sydney. This species approximates closely to 



Lipeurus limitatus Kellogg (1896, p. 124) from Pufpnus 



griseus Gmel. from California, but differs in being little 



more than half the size, in the shape of the prothorax, 



in the median interruption of the abdomen being con- \^? 



tinuous through 8 segments and not 7 only, and in the 



disposition of the interruptions of the hind-head. The 



male is unknown, as is the male of L. limitatus, Kellogg 



also having collected females only. 



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Lipeurus diversus var. excavatus var. nov. 



This form is intermediate between L. augusticeps 

 Piaget (1880, p. 306) and L. diversus Kellogg (1896, 

 p. 123), approaching more closely to the latter. Our 

 form differs from Kellogg's species in having distinct 

 lateral bands on the margin of the clypeus.. in front of 

 the antennal bands ; occipital blotches slightly different 

 in arrangement ; bands of prothorax produced more 

 markedly on to metathorax, and not interrupted at 

 the suture ; hairs on posterior margin of metathorax 

 slightly different in arrangement, the second hair from 

 the angle being small, and not of almost equal length 

 with the others ; lateral bands of abdomen distinctly 

 broader, each produced anteriorly into a concavity in 

 posterior margin of that of preceding segment ; this 

 posterior margin with a clear diverticulum towards 

 lateral margin, the exact relations being best seen in the figure. The 

 sexual dimorphism agrees with that shown in Kellogg's figures of L. diversus, 

 but as the one male at our disposal has lost his antennae we are unable 

 to compare the males satisfactorily. 



Several specimens from Oestrelata neglecta Schl. from Sunday Island. 

 We have figured a female. 



Fig. 2. 



Lipeurus diversus 

 var. excavatus. 



