On the Binnhi//!i<f Fauna of South Africa (Dipt era). 109 



longirostris, and hyaline ai'ound the transverse veins ; the veins are 

 pale yellow, darkened at end ; the scaly hairs on the base of the costa 

 and first vein are yellowish ; there is sometimes the recurrent stump 

 of a vein in the basal angle of the second longitudinal vein. 



HENICA, Macquart (1834). 



The characters of this genus and the differences from Cyllenia have 

 been pointed out by Loew under the name of Lagocldlus ; Loew has 

 also noticed the length of the praefurca, or, as he says, the shortness of 

 the first submarginal cell. This character shows an affinity between 

 Heinea and Nomalonia and the true Exoprosopinae, and it is important 

 to note that Wiedemann first described the species as belonging to 

 Anthrax. Both genera have a rather isolated position in the Cylleniiuae. 



HENICA LONGIROSTRIS, Wiedemann (1878;. 



A well-known, common South African species, very distinct owing- 

 to the peculiar venation. 



A couple of specimens from the Cape, Hex River, November, 1882, 

 labelled by Bigot " CyUemapluricellata, Macq." ; another female speci- 

 men from Stelleubosch (Cape), L. Pt'ringuey. 



The four anterior tarsi of the male have the same structure as 

 described above for Nomalonia afra. 



PERINGUEYIMYIA, Bigot (1886). 



A genus briefly described by Bigot, and with affinity to Amicttm, 

 from which it differs chiefly in the recurrent, strongly looped end of the 

 second longitudinal vein, and in the long, strongly curved and 

 appendiculate upper branch of the cubital fork. The structural 

 features of the genus are as follows : Body broad and stout ; abdo- 

 men depressed. Head with the occiput much inflated above; the 

 middle longitudinal furrow of the vertex is present, but it is much less 

 pronounced than in Cyllenia; ocular border bare. Ocellar tubercle 

 less prominent, with three well -developed ocelli, disposed in an equi- 

 lateral triangle. Eyes bare, with non-indented bind border and with 

 the upper areolets distinctly enlarged in the male ; they are closely 

 approximate together for a long distance, but not touching in the male 

 and not broadly separate in the female. Vertical triangle of male 

 small many times smaller than in Henica or in Nomalonia. Face 

 short, not pi'ouiinent, with a fine moustache of dense hairs on the sides 



