260 MR. walkee's catalogue of dipteeotjs insects 



white subapical tuft ; appendages large, black, shining. Legs very 

 robust; femora with red stripes; tibise red. Wings brown; veins 

 black ; halteres tawny. Length of the body 10 lines ; of the wings 

 16 lines. 



Gen. AsiLUS, Linn. 



7. AsiLUS AREOLATUS. Fffiwi. Cinerco-niger, barba parva, mystace 

 nigro, abdoraine lanceolato, pedibus robustis, alis nigricantibus postice 

 cinereis. 



Female. Cinereous black. Head dark gilded in front ; epistoma con- 

 vex ; beard small ; mystax with numerous black bristles, occupying 

 most of the face. Third joint of the antennas fusiform ; arista about 

 thrice the length of the 3rd joint. Abdomen lanceolate, black and 

 shining towards the tip, more than twice the length of the thorax. 

 Legs robust, with black hairs and bristles. Wings blackish, blackish 

 cinereous hindward, where the disks of the areolets are cinereous; 

 veins black ; hind branch of the cubital vein undulating. Length of 

 the body 10 lines ; of the wings 18 hues. 



8. Asilus mendax. Walk. Trans. Ent. Soc. Lond. New Series, iv. 130. 

 Allied to A. areolaris. 



Gen. Ommattus, Illiger. 



9. Ommatius strictus. Walk. See Vol. IV. p. 109. 



Fam. BOMBYLID^, Leach. 



Subfam. Theeevites, Walk. 



Gen. Theeeva, Latr. 



10. Thereva congrua. Walk. See Vol. IL p. 90. 



Fam. MUSCID^, Latr. 



Subfam. Dexides, Walk. 



Gen. Dexia, Meigen. 



IL Dexia CYLiNDRicA, n. s. Mus. Nigra, gracilis, cylindrica, capite 

 argenteo, frontalibus atris, pectore argenteo maculis quatuor atris, 

 abdomine fasciis interruptis albis, pedibus longissimis, alis nigricante 

 cinereis. 



Male. Black, slender, cylindrical. Head silvery white ; frontalia deep 

 black, linear ; face vertical. Antennae reaching the epistoma ; 3rd 

 joint hnear, full four times the length of the 2nd ; arista plumose. 

 Pectus silvery white, with two deep-black spots on each side. Abdo- 

 men slightly compressed, full twice the length of the thorax, with an 

 interrupted white baud on the fore border of each segment, and with 

 stout black bristles on the hind borders of the segments. Legs very 



