84 



Genus BELVOSIA Desv. 



Belrtma Desvoidy, Essiii siir los Myodaires, p. 103; 1830. 

 LuhviUia Desvoidy, loc. cit., p. 104. {Xon lioiix; 1S27.) 

 IVillistonia Brauer auil Bergoustamin, Zweif. Kais. Miis. Wioii, IV, p. 97; 1889. 



The identity of JJelvosia and Latreillia has been ackiiowiedincd by 

 several authorities; aud lirauer and Bergenstamm state' that the lat- 

 ter (the name of which is preoccupied in tlie Crustacea) is a subgenus 

 of Willistonia. Our si)ecies have lour postsutural aud four sterno- 

 pleural uiacrocha'ta' : 



1. Third abdominal segment yellowish pollinose except apically, wings 



brownish 2. 



Third segment destitute of yellowish pollen, abdomen gray polli- 

 nose excei)t on the fourth segment, whicli is yellow pollinose, 

 . frontal vitta yellow, wings hyaline; length, 10 to V2 mm. Mas- 



J.wX. sachusetts; Ithaca and New York, N. Y.; Chicago, 111. ; Tiftou, 



Ga. ; and Mississippi. (Essai sur les Myodaires, p. 105; 1830: 

 LatrvUlia. E.vorista JlavicHiida liiley, Second liept. Ins. Mis- 

 souri, p. 51; 1870: from the type S])ecimen.). .uni/asciata Desv. 



2. Sides of fare at narrowest i)art each one-third as wide as the median 



de[)ression, frontal vitta yellow, abdomen black, bases of last 

 three segments yellowish gray pollinose; lengtii, 11 mm. 

 Charlotte Harbor, Florida. (Proc. Acad. JSTat. Sciencjes Phila., 



p. 312; September, 1895.) slostionw Coq. 



Sides of face at narrowest i»oint each more than one half as wide as 

 median depression, frontal vitta dark brown, abdomen black, 

 the last two segments except tlieir apices yellowish polliiu)se, 

 base of the second sometimes also narrowly yellowish pollinose; 

 relation of second and third antennal joint varies as follows: 

 female, third Joint 1.], l^, 2, 2.} times as long- as the second; 

 male, third Joint 2',, 3, 'S.\, and 1 times as long as the second; 

 facial ridges bristly in lemale /,, 5, and Vj, in male 'f^ to -.l distance 

 above the vibrissje; lengtli, 13 to 17 mm. Springfield, Mass.; 

 District of Coiuinbia; North Carolina; Tifton,(Ja.; Mississippi; 

 St. Louis, M(».; Illinois; Los Angeles Co., Cal.; Waco, Tex., and 

 Mexico. (Systema Entomologiu', p. .77; 1775: Mufica. Belvosia 

 bicinrta Desvoidy, Kssai sur les Myod., j). 103; 1830. Latreillia 

 bifasciata F., Brauer and Bergenstaumi in litt.). . bij'asciata Fabr. 





Zweif. Kais. Miis. Wieu, VI, p. 213; 1893. 



