PLATE III. 



FAMILY XX. EMPLOYE. 



GENUS 1. Empis. Fig. 1. Empis livida. 1 a, head with antennae 

 and parts of proboscis extended ; 1 5, antenna ; 1 c, extremity of 

 tarsus ; 1 d, antenna of Empis borealis. 



GENUS 2. Hilara. Fig. 2 a, head of Hilara cilipes, sideways ; 

 2 &, tarsus of fore leg of male. 



GENUS 3. Ragas. Fig. 3. Ragas unica. 3 a, head, sideways; 3 b, 

 antenna ; 3 c*, proboscis of female, from side ; 3 ?*, ditto, en- 

 larged ; 3 e*, ditto, from above ; 3 /, labrum ; 3 g* t one of the 

 palpi ; 3 fi* t outline of head of male, from below, with small pro- 

 boscis ; 3 i* t proboscis of ditto, with palpi in situ and detached. 



GENUS 4. Brachystoma. Fig. 4 , head of Bracliystoma longicornis, 

 sideways; 4 b, antenna. 



GENUS 5. Ardoptera. Fig. 5. Ardopterairrorata. 5 a, head, side- 

 ways ; 5 b, antenna. 



GENUS 6. Heleodroxnia. Fig. 6. Heleodromia stagnalis. 6 a, 

 antenna; 6 b*, proboscis with one palpus, the latter seen ob- 

 liquely and somewhat narrowed ; 6 c*, labrum ; 6 d* y labrum 

 with one palpus ; 6 e*, tongue, with portion of epistoma ad- 

 hering (comp. TFiedemannia, fig. 7 d) ; 6/*, base of wing of a 

 specimen with a supernumerary transverse vein marked with a 

 small * (a circumstance not very rare), to illustrate the wing of 

 Clinocera, Meig. 



GENUS 7. Wiedemannia. Fig. 7. Wiedemannia lota (a specimen 

 with a minute triangular cell in the disc of each wing). 7 a*, 

 head ; 7 b*, ditto, sideways ; 7 c*, proboscis, with the tongue 

 and one palpus removed ; 7 d* t the lingua, with the base ab- 

 ruptly enlarged, forming a large blunt tooth on each side (comp. 

 DolicJiopus) ; 7 e* t labrum, with membranous edge, notched at 

 the tip ; 7 /, antenna ; 7 g, extremity of tarsus seen obliquely. 



J. 0. W. 



* The figures of the generic details in this and subsequent plates, indicated by 

 a *, are engraved from drawings communicated by A. H. Haliday, Esq. 



