278 ME. walker's catalogue of dipterous insects 



nigris, abdotnine purpureo basi purpurasceati-cupreo apice cyaneo, 

 alis nigricantibus strigis basique cinereis, halteribus albidis. 

 Male. Bright blue. Head and pectus with silvery white tomentum ; 

 mystax with many white bristles and with a few longer black bristles. 

 Antennae black, about as long as half the breadth of the head; 3rd 

 joint linear, longer than the 1st and 2nd together. Thorax with two 

 silvery-white tornentose humeral spots. Abdomen linear, bright 

 pur[)le, purplish cupreous at the base, mostly bright blue at the tip ; 

 hind borders of the ventral segments silvery white. Legs robust, 

 thickly beset with black bristles; anterior femora with numerous 

 white bristles ; fore tibise with shining white down beneath. Wings 

 blackish, with cinereous streaks towards the base, which is wholly 

 cinereous ; veins black ; halteres whitish. Length of the body 10 

 lines; of the wings 16 lines. 



27. Laphria CONSURGENS, n. s. F(£m. ^nea, capite pectore macu- 

 lisque duabus humeralibus argenteis, mystace albo nigro, antennis 

 nigris, thoracis lateribus viridi variis, abdomine purpureo-cyaneo, alis 

 nigricanti-fuscis, halteribus albidis. 



Female. iEneous. Head and pectus with silvery-white tomentum ; 

 mystax with many short white bristles, and with very few long black 

 bristles. Antennfe black, hardly longer than half the breadth of the 

 head; 3rd joint linear, much longer than the 1st and 2nd together. 

 Thorax tinged with green on each side ; two silvery-white tornentose 

 humeral spots. Abdomen bright blue, varied with purple ; hind bor- 

 ders of the ventral segments whitish. Legs robust, green, varied with 

 blue and purple, beset with a few black bristles ; fore tibiae with very 

 pale gilded tomentum beneath. Wings blackish brown ; veins black ; 

 halteres whitish. Length of the body 8 lines; of the wings 14 lines. 



28. Laphria tristis, Dol. See ante, p. 146. 



2.9. Laphria CONVENIENS, n. s. Mas. Nigra, capite postico argenteo, 

 mystace antennis pedibusque nigris, thorace obscuro, pectore ferru- 

 gineo-tomentoso, abdomine nigricanti-cupreo, alis cinereis, dimidio 

 apicali nigro, halteribus pallida luteis. 



Allied to L. partita. 



Male, Black, robust. Head with silvery cinereous tomentum behind ; 

 mystax with several black bristles. Antennae black, nearly as long as 

 half the breadth of the head; 3rd joint elongate fusiform, a little 

 longer than the 1st and 2nd together. Thorax dull ; pectus with 

 ferruginous tomentum. Abdomen blackish cupreous, shining. Legs 

 black, very robust, thickly beset with black bristles. Wings cinereous, 

 black for rather less than half the length from the tips ; veins black ; 

 halteres pale luteous. Length of the body 6 lines ; of the wings 10 

 lines. 



This is most likely the male of L. consentanea ; but, as the wings .are 



