200 STRATIOMYID^ 



male, and also shows that Braiier was guilty of carelessness in calling the genus 

 Chlorisops. In 1863 Eondani (Arch. p. Zool. _ Modena, iii., 86) returned to the 

 defence of his genus Chorisops, and distinguished Actina Meig., Beris Latr., 

 OpJachantha (sic) Rond., and Chorisops Rond., and then laid stress upon the hairy 

 eyes of Actirui and Beris as against the bare or almost bare eyes of the otiiers. In 

 1882 Brauer placed too much stress upon the frequently_ incomplete veinlet from the 

 discal cell, but clearly distinguished Actina with its hairy eyes from the bare-eyed 

 genus Chorisops, and ever since then the two dismemberments {Actina and Chorisops) 

 of the old genus Beris may be considered definite ; I have however more to say 

 al)out Exaireta Schin. in my synonymical notes under the genus Chorisoj)s. 



Table of Species. 



1 (4) Abdomen reddish orange. 



2 (3) Abdominal pubescence of the male black. Wings of the female 



light brownish with a conspicuous stigma. 1 vallafa. 



3 (2) Abdominal pubescence of both sexes yellow. "Wings of both 



sexes dark brownish black. 2 clavipes. 



4 (1) Abdomen all blackish. 



5 (10) Thoracic pubescence of the male black. Antennte placed just 



below the middle of the head. Legs mainly black or dark 

 brown, or brownish yellow, but never pale yellow. 



6 (7) Antennse with the third joint less than twice as long as the other 



two joints together. Tarsi with the basal joint of the hind 

 pair in the male as in B. geniculata, but the legs in both sexes 

 rather paler than in B. rjcniculata. 4 fuscipes. 



7 (6) Antennae with the third joint more than twice as long as the 



other two joints together. 



8 (9) Legs black with the knees orange; basal joint of the hind tarsi 



in the male moderately and equally dilated, longer, than the 

 other four joints together. 3 geniculata. 



9 (8) Legs brownish orange, or lighter in the female, but unicolorous 



from the coxee to the tarsi ; basal joint of the hind tarsi 

 considerably and unequally dilated in the male, not longer than 

 the other four joints together. 5 chalyheata. 



10 (5) Thoracic pubescence of the male yellow. Antennae placed on the 

 lower quarter of the head. Legs pale yellow. Frons of the 

 female narrow. 6 Morrisii. 



1. B. vallata Forster. Abdomen reddish orange without any narrow 

 black cross-bands ; abdominal pubescence of the male black. Hind tibiae 

 black on the apical half or more. Wings of the male dark brownish, but of 

 the female light brownish with a yellowish base and a conspicuous dark 

 brown stigma. 



^&' 



A rather small fly which appears to mimic certain Tenthre- 

 dinidce in its bright orange abdomen. _ 



S . Head black ; face subquadrate and a little arched, about one-third the width 

 of the head, beai'ing rather dense moderately short black pubescence, while 



