28 INSECUTOR insciti;e menstruus 



the short joints white, with black rings, the last two joints 

 long and dark. Front tarsi with one large and one smaller 

 claw, each with a tooth ; hind small, equal and simple. 



Genitalia. Side pieces large and stout, about twice as long 

 as wide, a large excavation at base reaching beyond the middle. 

 At the apex of this a stout lobe, bearing at tip two very stout 

 blade-like short spines, and on the side a patch of about six 

 short setae, one of which is longer and stouter than the others. 

 A small dense patch of setae at base of lobe and another mid- 

 way between it and the tip ; apex rather densely haired. Clasp- 

 filament stout, bent near base. Harpes rather weakly chiti- 

 nized, with a basal arm, the tip densely spinose ; unci showing 

 four plates, the first triangular, slender, well chitinized; sec- 

 ond short, thick, curved outward at tip, lamellate, the margin 

 serrate, very strongly chitinized ; third long, tooth-like ; fourth 

 short, with an outwardly directed point at tip. No basal ap- 

 pendages ; no scales. 



Female. All the specimens have been badly handled and are 

 practically denuded. Mesonotum apparently with narrow 

 curved light bronzy brown scales. Proboscis with a broad 

 white ring a little beyond the middle, as in the male. Tarsal 

 rings small, yellowish white. Abdomen with narrow basal 

 segmental white bands. 



Type, male, No. 22689, U. S. Nat. Mus. 



Three males and six females, St. Thomas and St. John, 

 Virgin Islands (Dr. E. Peterson), sent under transmission 

 numbers St. J.-12 and D-1. 



In reply to inquiry, Doctor Peterson writes : "The larvae of 

 St. J.-12 were caught in a large pond very near the seashore 

 at Leinster Bay, St. John, Virgin Islands of the U. S., on the 

 22nd of October, 1919, and the adults emerged on the 2(ith 

 October, 1919. This pond through the present rainy season 

 constitutes for all practical purposes a fresh water pond. It is 

 a very shallow pond, which during high tide will receive the 

 tide water. 



"The larvae of D-1 were caught in fresh water pools in the 

 upper part of Dominigade Gut, so called, St. Thomas. The 



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