HARVEST MITES. 139 



CASE described sericeum : we reproduce his figure, and have only to 

 add that the colour is pale red. It was found in Iowa and Min- 

 nesota in great numbers, creeping into the holes in which the 

 locusts' eggs have been deposited, and eating the contents of the 

 eggs voraciously. 



No. 24. TrOiMBIDIum miniatum {Herm. Mem. Apt.).— 24. Enlarged figure of ditto, 

 copied from Hermann. 



Very similar in form to the species already described as 

 Megamerus celer, but of a pale red lead colour. 



No. 25. Trombidium aurantiacum {Walck. Apt.), (Tr. Aphidis, 1 De Geer). — 

 25. Enlarged figure of larva, copied from Walckenaer's Apteres. 



Trombidium aurantiacum. 



A squat obtuse orange-coloured mite, of which the perfect 

 form is not known with certainty, but it has been supposed to be 

 a species described by De Geer, under the name Trombidium 

 aphidis, which feeds on the black Aphis, which is so abundant in 

 beans, poppies, and other plants. 



