114 ME. WALKEE ON DIPTEEA COLLECTED AT MAKESSAE. 



eyes ; proboscis longer than the breadth of the head, its sheaths diver- 

 ging and convoluted at the tips ; antennaj a little longer than the pro- 

 boscis, lanceolate towards the tips ; thorax with two pale-yellow streaks 

 on each side, one in front, the other behind the wing ; abdomen lurid, 

 black at the base, above, and towards the tip, where it is fusiform ; its 

 petiole very long and slender ; femora beneath and tibiae towards the 

 tips lurid ; wings blackish grey ; veins black ; halteres whitish, with a 

 black subapical band. Length of the body 7 lines ; of the wings 8 

 lines. 



ram. DOLICHOPID^, Leach. 

 Gen. PsiLOPUS, Meigen. 



70. PsiLOPUS SPECTABILIS, n. s. Mas. Aureo-vh'idis, capite pur- 

 purascente-C3'aneo, antice argenteo, antennis testaceis, thorace vittis 

 tribus cupreis, scutello cyaneo, abdominis lateribus cupreis, pedibus 

 flavis, alls albis,costa lituris duabus costalibus lutescentibus, halteribus 

 testaceis. 



Male. Bright golden green ; bead purplish blue, with silvery tomentum 

 in front ; antennae testaceous ; arista black, shorter than the thorax; 

 thorax with three bright cupreous stripes ; scutellum blue ; pectus 

 silvery ; abdomen bright cupreous along each side 5 legs yellow ; tarsi 

 black towards the tips ; wings white, brown along the costa and on 

 more than one-third of the length from the tips, with the exception 

 of the hind border ; the costal brown part including two transverse 

 lutescent marks, beyond which there is a brown band ; veins black ; 

 fore branch of the prsebrachial vein nearly straight ; discal transverse 

 vein straight ; halteres testaceous. Length of the body 4 lines ; of 

 the wings 8 lines. 



71. PsiLOPUS FiLiFER, n. s. Mas. Viridescente-cyaneus, capite pec- 

 toreque argenteis, antennis pedibusque nigris, arista longissima, ab- 

 domine viridi fasciis nigris, tibiis anterioribus albidis, alis subcinereis. 

 Fcum. ? Viridis, capite cyaneo, tibiis anterioribus testaceis. 



Male. Greenish blue ; head and pectus with silvery white tomentum ; 

 antennae black ; arista much longer than the body ; abdomen green, 

 with a black band on the base of each segment ; legs black, long, 

 slender ; anterior tibiae dingy whitish ; wings slightly cinereous ; veins 

 black ; fore branch of the praebrachial vein much curved ; discal trans- 

 verse vein very slightly undulating. 



Femalel Bright green; head blue, its fore part and the pectus with 

 silvery white tomentum ; abdomen with black bands ; anterior tibiae 

 testaceous ; discal transverse vein straight. Length of the body 2^ 

 lines ; of the wings 5 lines. 



72. PsiLOPUS ^STiMATus, u. s. Mas. Viridis, capite pectoreque 

 argenteis, antennis nigris basi testaceis, abdomine fasciis latis nigris, 

 pedibus flavescentibus, femoribus posticis apice tarsisque nigris, alis 

 subcinereis, halteribus testaceis. 



