LARVAL MITES OF THE GENUS EUTROMBIDIUM 
ATTACHED TO A CAROLINA LOCUST 
By W. W. Judd 
Department of Zoology 
University of Western Ontario, London 
A pinned female specimen of the Carolina Locust (Dis- 
sosteira Carolina L.) captured at Bayfield, Ontario, July 
25, 1924, and deposited in the collection of the University 
of Western Ontario, had a number of mites attached to the 
upper surface of the hind wings (Fig. 1 - L). Some of the 
mites were scraped off with a needle and were put in pre- 
servative and were identified by Dr. E. W. Baker, Bureau 
of Entomology and Plant Quarantine, Washington, D. C., as 
Eutrombidium {trigoniim (Hermann)?). 
Fig. 1. Outspread liiiid wings of Di'iso.sieim Carolina L. to show' attached 
larval mites (L). C — Costa, Cu — Cubitus, M — Media, Ri — First branch 
of Radius, Rs — Radial sector, R+M — Radius+Media, Sc — Subcosta, 
IV — First Vaniial vein, vd — vena dividens, Vp — primary vannal vein. 
Vs — secondary vannal vein. 
There were 39 mites on the left wing and 40 on the right 
wing, on the upper surface, and a single mite was located 
on the lower surface of the left wing on a vannal vein near 
the hind border of the wing. They were attached to the 
veins by their anterior ends and were confined to the sec- 
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