on the Bionomics of Southern Nigerian Insects. 439 
6. A Carabid Larva attacking a Snail. 
[Dr. C. J. Gahan, who has examined this fine Carabid 
larva, informs me that it is impossible to determine its 
genus. | 
May 28, 1918.—While at Agege last I noticed a fairly 
large snail climbing up the wall of an out-house. I was 
attracted by its apparently “ frothing” or blowing bubbles 
as it climbed. It fell down, and looking at it I found that 
it was attacked by a very large Coleopterous larva which I 
have sent you—if it is a larva. It is a horrid-looking 
creature. I tried to feed it up or give it a chance to oviposit, 
but it died, so I “spirited” it away. I left the snail in 
the tin in case ova had been laid, and now find that a large 
Dipteron had been there. I do not think it can have 
become infected while I had it. But the pupae are there, 
and I may get them bred out. 
7. Procryptic Beetles, probably Passalidae. 
July 3, 1915.—In a dead palm which had just been felled 
I got three very odd-looking beetles. They are very flat 
and hard, which I imagine is a special adaptation to permit 
of them getting between the closely pressed leaf-bases of 
the palm, where they were found. 
8. Beetles accidentally introduced in C. O. Farquharson’s 
Consignments. 
[The following beetles were found in the cotton-wool 
or among the “ papers” in a package received in January 
1918 :—Cucustwak : 12 Cathartus advena Walt. ; 2 C. cassive 
Reiche; 3 Haemophloeus pusillus Sch.; 1 Silvanus suri- 
namensis L. CurcuLiontrpAE: 1 Calandra oryzae L. 
ScotytmipaE: | Taphrorychus bicolor Hbst. 
Loose in a box received in July 1918 :—PrINIDAE: 
1 Lasioderma serricorne F. 
Loose in a box containing a pupa of Teratoneura, parasi- 
tised by small Chalcids (p. 459), received in 1917 :—Cory- 
LOPHIDAE : 2 Sericoderus lateralis Gyll. 
The species were kindly determined by Mr. G. J. Arrow. ] 
V. DIPTERA. 
A. Tur Hapits oF TWO NEW MyRMECOPHILOUS 
CECIDOMYIDAE. 
1. Farquharsonia rostrata Collin, gen. et sp. n. (p. 505). 
[The material includes 6 2, captured April 13-15, 1918, 
