( exxxviii ) 



while the other slowly circled round her, slightly above, 

 making a most peculiar hum in which there was something 

 of the rattlingnoise made by the large ' clockwork ' Pompilidae, 

 but can lie best described as like the noise of an aeroplane 

 heard fairly high up. Here again the $ darted off just as 

 things got exciting. I saw another couple on a subsequent 

 day, and was very anxious to net the hummer to prove it 

 was a c?j hut I couldn't get it apart from the other. I 

 noticed on the second occasion that the sitting specimen 

 vibrated its wings slightly also. 



" Cklamys marshalli, Jac. (Chlamydinae, allied to the Grypto- 

 cephalinae).—On Dec. 3rd I got a most curious beetle which 

 I am sure is specially procryptic. It is a small, square, solid 

 little insect with no limbs or antennae visible, and no con 

 strut ions visible between head and thorax or thorax and 

 abdomen. It is of a greenish brown colour with rough 

 integument. It was sitting on a vertical stem, closely apposed 

 to it, and when I saw it I thought, k Why does that caterpillar 

 excrement remain on a vertical stem ? ' For that is precisely 

 its appearance. It was not till I examined it very closely 

 in my hand that I realised it was a beetle, and had it been 

 resting on a horizontal leaf I should certainly have looked for 

 a large caterpillar! I hope you will find it in the box and 

 identify it. 



" One more observation — quite a small one. but rather a 

 curiosity. I was at a flowering shrub visited by many 

 Eymenoptera, among them one of the large 'clockwork' 

 black Pompilidae. It flew high over my head, but as it 

 went about was closely followed by some half-dozen smaller 

 black Ilymenoptera, that might have been Scoliidae, just as 

 small birds mob a big one. I can give no explanation, and 

 am much puzzled by it. 



" Jan. 1, 1918. Ltdanguru. 



" With reference to this box. No. 5 [containing Lulanguru 

 captures of Dec, 1917], there are in it some nice, small 

 Braconoid and Lycoid Longicorns, the former of which have 

 absolutely deluded me in the field ! I watched one quite a 

 long time flying among som< md said to myself, ' Ah ! 



