6 



ME. F. WALKER ON DIPTERA COLLECTED AT 



Female. Black ; head with gilded tomentum, cinereous behind ; epi- 

 stoma flat, with two pale bristles ; palpi short ; antennae mutilated ; 

 thorax and pectus with gilded tomentum, the former with four broad 

 black stripes, the latter with two black bands ; abdomen clavate, 

 about twice the length of the thorax, very slender towards the base, 

 where it is dilated ; fore part with three tawny bands, 3rd band in- 

 terrupted in the middle, dilated on each side ; legs red, slender ; 

 tarsi black ; posterior femora and tibiae with a broad black middle 

 band ; wings cinereous ; veins black ; halteres yellowish. Length of 

 the body 6 lines ; of the wings 1 lines. 



Subfain. Laphrites, Walk. 



Gen. Laphria, Fair, 



11. Laphria tristis, Dol. See Vol. V. p. 146. 



12. Laphria comes, Walk. See Vol. III. p. 85. 



13. Laphria conveniens, Walk. See Vol. V. p. 278. 



14. Laphria setipes, n. s. Mas. Cyanea, capite argenteo, anten- 

 narum articulo 3° lineari, thoracis lateribus anticis pectoreque albo to- 

 mentosis, abdomine purpureo longo, pedibus purpureis longissime 

 setosis, femoribus posticis incrassatis, alis nigricantibus dimidio basali 

 cinereo, halteribus albis. 



Male. Blue ; head silvery in front, thickly clothed beneath with white 

 hairs ; mystax with a few black bristles ; third joint of the antennae 

 linear, conical at the tip ; pectus and sides of the thorax in front with 

 white tomentum ; abdomen purple, slender, linear, about twice the 

 length of the thorax ; legs purple, thickly clothed to the tips of the 

 tarsi with long black and white bristles ; femora much incrassated, 

 partly blue ; wings blackish, cinereous for nearly half the length from 

 the base ; veins black ; halteres white. Length of the body 8 lines ; 

 of the wings 12 lines. 



15. Laphria flagellata, n. s. Mas et Fcem. Nigra, capite aurato, 

 antennarum articulo 3° lato fusiformi, pectore albo tomentoso, seg- 

 mentorum abdominalium marginibus posticis lateralibus albis, pedibus 

 purpureo variis, alis nigris basi cinercis. Mas. Abdomine purpureo. 



Male and Female. Blue ; head brightly gilded in front, clothed beneath 

 with white hairs ; mystax with several black bristles ; antennae black, 

 third joint broad, fusiform ; pectus with white tomentum ; abdomen 

 with white tomentum on the hind borders of the segments; legs 

 partly purple, thinly beset with black and white bristles ; wings 

 black, cinereous towards the base ; veins and halteres black. Male. 

 Abdomen purple. Length of the body 4i-5 lines ; of the wings 8-9 

 linen. 



