44 MECOPTERA AND PLANIPENNIA 
It is distinguished by the dark markings of the head, the 
median ones are narrower and the anterior lateral ones 
are irregular at their distal border. The posterior ones 
are rather broader. 
Body 22 mm., forew. 26 mm., hindw. 24 mm., ant. 5} mm. 
Abd. 16 mm., gr. br. 7 mm, gr. br. 5} mm. 
Habitat: Halmaheira. 
One female from North Halmaheira, collected by Dr. 
Bernstein. 
Myrmeleon acer celebensis Mac Lachlan. 
(Plate 3, fig. 14, ©). 
Nearest in size to acer acer and novae-guineae. The 
median markings very narrow and distinctly separated, 
the anterior lateral ones regular, narrow, nearly quadran- 
gular, the posterior ones broad, nearly round. 
Body 28—29 mm., forew. 28—30 mm., hindw. 26—274 mm., ant. 54 mm. 
Abd. 20—22 mm., gr. br. 7 mm., gr. br. 6 mm. 
Habitat: Celebes. 
I have before me Mac Lachlan’s type, a 6 from Ma- 
casser, collected by Mr. M.C. Piepers, a Q from Gorontalo, 
collected by von Rosenberg, and another Q from Soemalata, 
North Celebes, collected by the controller E. B, W. G. 
Schröder. 
Myrmeleon acer javanensis, nov. subsp. 
This is a very small and feeble form, nearest related 
to celebensis in the markings of the head, which are still 
more reduced (cf. fig. 19). The lateral posterior ones are 
also much reduced and only a little broader than the 
acutely triangular anterior ones. 
Body 22 mm., forew. 224 mm., hindw. 20 mm., ant. 4 mm. 
Abd. 16 mm., gr. br. 54 mm., gr. br. 44 mm. 
Habitat: Java. 
We are endebted for an interesting series of this new 
Notes from the Leyden Museum, Vol. Xx XXI. 
