224 MR. F. WALKER ON DIPTEEA COLLECTED IK 



black bristles. Wiugs blackish, cinereous towards the base ; veins 

 black ; halteres yellowish white. Length of the body 10 lines ; of the 

 wings 18 lines. 



Subfam. Asilites, Walk, 

 Gen. AsiLUS, Linn. 



8. AsiLUs BiLiGATUs, n. s. Mas. Cervinus, capite antico albido, 

 mystace e setis albis, antennis nigris, thorace vittis quatuor fuscis, 

 abdomine fusco segmentis cinereo uiarginatis apice nigro, pedibus 

 luteis, alis cinereis apice nigricantibus, halteribus flavescentibus. 



Male. Fawn-colour, with a few black bristles. Head whitish in front ; 

 epistoma not prominent ; mystax composed of several white bristles. 

 Proboscis, palpi, and antennae black ; 3rd joint of the antenna; lance- 

 olate ; arista a little longer than the 3rd joint. Thorax with four 

 brown stripes, the lateral pair interrupted. Pectus hoary. Abdomen 

 brown ; hind borders of the segments cinereous ; tip black, shining. 

 Legs luteous, robust, with a few black bristles ; tarsi piceous towards 

 the tips. Wings cinereous, blackish towards the tips ; veins black ; 

 halteres yellowish. Length of the body 10 lines; of the wings 18 

 lines. 



G-en. Ommatius, llliger. 



9. Ommatius lucifer. Walk. See Vol. IIL p. 88. 



10. Ommatius invehens, n. s. Faun. Niger, sat robustus, facie 

 albida, mystace e setis albis, thoracis suturis lateribus pectoreque 

 canis, abdomine clavato segmentis cinereo marginatis apice fulvo, 

 tarsis posticis basi tibiisque fulvis, alis nigricanti-cinereis, halteribus 

 pallide flavis. 



Female. Black, rather stout. Face whitish ; mystax composed of white 

 bristles. Third joint of the antennae conical, very small. Shoulders, 

 sutures and sides of the thorax, and pectus hoary. Abdomen clavate, 

 rather flat, less than twice the length of the thorax ; hind borders of 

 the segments cinereous ; tip tawny. Legs stout ; tibiae tawny ; hind 

 tarsi tawny towards the base. Wings blackish cinereous ; veins black ; 

 halteres pale yellow. Length of the body 6 lines ; of the wings 13 

 lines. 



"Fam. BOMBYLID.^, Leach. 

 Subfam. Thebevites, Walk. 

 Gen. Thebeva, Latr. 

 U. Thereva congrua. Walk. See Vol. IIL p. 90. 



Subfam. Bombtlites, Walk. 

 Gen. Anthrax, Fahr. 

 12. Anthrax Pclops, Walk. See Vol. HI. j). 90. 



