118 INSECUTOR INSCITI^< MENSTRUUS 



scales. Abdomen blackish above, silvery white below, the 

 colors separated on the sides in a straight line. Legs bronzy- 

 black scaled, the femora whitish below ; mid tarsi with the 

 apical half of the second joint, the third and fourth continu- 

 ously white-scaled below ; hind tarsi with the fourth and fifth 

 joints continuously white-scaled below. Wing-scales broad, 

 obliquely subtruncate, bronzy blackish ; basal cross-vein nearer 

 the base of the wing than the anterior. Proboscis moderate, 

 slender, slightly expanded at tip, about as long as the abdo- 

 men. 



Genitalia. Side-pieces three times as long as wide, the tips 

 conical and much narrowed. Clasp-filament sessile, divided 

 into four lobes : a short slender arm ; a long spatulate one with 

 recurved tip and spines on one margin ; a long slender one 

 with stout apical hook and spine opposite it ; a short slender one 

 with row of four close teeth at tip and a feather-like projection 

 from the summit. Harpes bent at right angles and elongated. 

 Unci inflated, constricted, then a large inflated trilobate apex. 

 Basal appendages small, but with long spines which are clawed, 

 angularly expanded before tip. 



Types, three males. No. 22006; U. S. Nat. Mus. ; Porto 

 Bello, Panama, March, 1911 (A. Busck) ; Caldera Island, 

 Porto Bello Bay, Panama, January 4, 1908 (A. H. Jennings). 



I am almost certain that this is the male of Wyeomyia phroso 

 Howard, Dyar & Knab, described as having prothoracic lobes 

 of the color of the mesonotum. On looking at the type of 

 phroso^ I can see a blue tint in a strong light ; the blue in 

 proviolans is dark and obscure ; but I keep the new name to 

 avoid any possibility of founding the new genus on a mis- 

 identification. 



Genus SABETHINUS Lutz 

 Sabethinus Lutz in Bourroul, Mosq. do Brasil, 48, 57, 1904. 



Type species : Sabethinus intermedius Lutz. 



Theobald describes the genitalia of the type species, but not 

 in such a manner as to be of service in the present review. 

 The genitalia are unknown to me, and I have placed the genus 



