94 AN EXPEDITION TO MOUNT BATU LAWI. 
NOTES ON THE SPECIMENS AND DESCRIPTION OF NEW SPECIES. 
Amphiaeschna grubauen, Forster. 19. 24.5.11. 
A large and handsome species, new to the Bornean fauna. 
Appears to differ from A. perampla, Martin, which has been re- 
corded from Borneo in its slightly larger size, and very narrow fork 
to Rs. Hind-wing in A. peranupla 2 62 mm. long, in A. grubauert 
2 (present specimen) 70 mm. long. Also in A. “grubaueri ? the 
outer half of each wing has a yellow tinge in addition to the dark 
brown mark at the base, whilst the thorax is entirely rich brown 
anteriorly with a pair of yellow stripes on either side. 
Jagoria modighaniu, Selys. 12 Mt. Selinguid, 4,800 ft. 31.5.11. 
Length of abdomen 45 mm. Length of hind-wing 44 mm. 
Approximates in size to Needham’s Dolaeschna elacatura which 
is regarded by Dr. Ris as synonymous with the present species, as 
is also the smaller Jagoria poeciloptera, Karsch, or at least speci- 
mens from Singapore referred to that species. 
GOMPHINAE. 
Leptogomphus williamsoni, sp. n. 6 adult. Locality Madiluit, 
alt. 2,000 ft. 
Length of abdomen with appendages 34 mm., hind-wing 25 
mm. 
A single row of cells in the anal area of the fore-wing. A 
basal sub-costal nerve of the second series present in all four wings. 
Dorsal thoracic stripe isolated, yellow ante-humeral stripe present, 
complete. A pair of small lateral basal yellow spots on abdominal 
segments 3-7. Segments 8-10 black, with an oval yellow dorsal 
spot on 10. Legs black. 15 ante-nodals and 10 post-nodals on 
fore-wing. Upper lip black with yellow base; genae yellow; vertex 
brown, the rest of the upper surface of the head black. 
Prothorax black with lateral yellow spot. 
Thorax black above, variegated with yellow; yellow below. 
Mesothoracic half-collar wedge-shaped, the base of the wedge 
lying close against the middle line, the dorsal stripe narrow; ante- 
humeral stripe continuous with the yellow of the undersurface. 
Anal appendages very dark brown. Upper pair laterally com- 
pressed, about equal in length to segment 10, ending in a sharp, 
upturned point, the outer border w ith 4 or 5 strong serrations, the 
most proximal of these being the largest, and forming a projecting 
tooth against which the Henan ier tion “ot the lower appendage bites. 
Lower appendage equal in length to upper pair, its distal half 
forked so that it ends in two widely divaricated spurs. (See fig. 
Be 
This new species approaches Microgomphus in possessing but a 
single row of cells in the anal area of the fore-wing. If the species 
is correctly referred to Leptogomphus—and in so referring it I 
Jour Straits Branch 
