288 MR. walker's catalogite of dipterous insects 



Male. Testaceous ; eyes black ; antennae small ; arista long and slen- 

 der ; thorax with two indistinct paler stripes ; abdomen black, testa- 

 ceous at the base ; hind femora incrassated, serrated beneath ; hind 

 tibiai black, slightly curved ; wings blackish ; veins black. Length 

 of the body 3 lines ; of the wings 7 lines. 



Fam. DOLICHOPID^, Leach. 

 Gen. PsiLOPUS, Meigen. 



36. PsiLOPUs A'ARiiPENNis, n. s. Fccm. Lsete viridis, capite pectore- 

 que albis, vertice purpurascenti-cyaneo, antenuis nigris basi testaceis, 

 thorace vittis duabus cupreis vittaque dorsali atra, abdomine fasciis 

 quatuor atris apicem versus cupreo micante, pedibus lialteribusque 

 flavis, alis albidis fasciis duabus connexis Uturaque costali basaii 

 nigris. 



Female. Brilliant green ; head shining white in front and behind ; ver- 

 tex brilliant purplish blue ; mouth tawny; antennse black, testaceous 

 towards the base ; arista as long as the thorax ; thora.x with a deep 

 black dorsal stripe and with a cupreous stripe on each side ; pectus 

 shining white ; abdomen with four deep-black bands, brilliant cupreous 

 towards the tip ; legs pale yellow ; tarsi and hind tibiae black ; wings 

 whitish limpid, with a blackish costal mark near the base, and with 

 two black bands; 1st band connected with the 2nd by the costa, 

 widely interrupted in the middle ; 2nd very broad, subapical, nearly 

 extending to the hind border ; veins black ; fore branch of the prse- 

 brachial vein slightly curved ; discal transverse vein undulating ; hal- 

 teres pale yellow. Length of the body 4^ lines ; of the wings 8 lines. 



Tain. SYEPHIDJE, Leach. 

 Gen. Ceria, Fah\ 



37. Ceria ANNULiFERA, n. s. Fcem. Nigra, capite flavo vittis tribus 

 nigris, arista albida, thoracis fascia, scutelli margine abdoniinisque 

 maculis duabus fasciisque tribus flavis, femoribus tibiisque basi flavis, 

 alis cinereis dimidio costali nigris. 



Nearly allied to C. relictura and to C. relicta. See vol. iii. pp. 93, 94. 



Female. Black ; head pale yellow, with a black vertex and a slender 

 black stripe, and with a broad black stripe on each side of the very 

 prominent peristoma ; arista of the antennae whitish ; thorax with a 

 slender yellow band which is dilated on the pectus, and with a yellow 

 humeral callus on each side; hind border of the scutellum yellow; 

 abdomen with a triangular yellow spot on each side of the base, and 

 with slender yellow bands on the hind borders of the 2nd, 3rd, and 4th 

 segments ; femora, and tibiae towards the base, yellow, this hue most 

 prevalent on the hiud legs ; wings cinereous, black for nearly half 

 the breadth from the costa ; interior border lurid ; vein black ; hal- 

 teres pale yellow. Length of the body 7 lines ; of the wings 12 lines. 



