186 DIAGNOSES OF NEW 



Hyalomyia piceipes n. sp. ? — Front black, trigonal, the 

 eyes a little separated on the vertex; face -white, not prominent; 

 thorax obscure cinereous ; antennae, thoracic stripes, and scutellum , 

 black; abdomen shining bluish-black ; legs brownish; wings hyaline. 

 — Length 6,5 mm. 



Hyalomyia m o e r e n s n. sp. $. — Front black , trigonal , sepa- 

 rating the eyes on the vertex; antennae, thorax, scutellum, and 

 legs, black; abdomen shining metallic violet; wings brown; small 

 cross-vein on the middle of the discal cell. — Length 4 mm. 



Hyalomyia umbrosa n. sp. $. — Black; front trigonal, 

 J scarcely separating the eyes on the vertex; abdomen shining violet; 

 wings grey , the veins broadly bordered with brown ; small cross- 

 vein beyond the middle of the discal cell. — Length 6 mm. 



Hyalomyia umbrifera n. sp. $. — Black; front trigonal, 

 scarcely separating the eyes on the vertex ; abdomen , except the 

 4 first segment, cinereous, with a black dorsal stripe and the hind 

 borders of the segments black; wings partly brownish; small cross- 

 vein beyond the middle of the discal cell. — Length 5,5 mm. 



G Y M N O S O M I N A E. 



Cistogaster ruficornis n. sp. $. — Head pale yellow; 

 . frontal band testaceous; antennae and palpi rufous; thorax anteriorly 

 \ testaceous with four brown stripes; abdomen rufous; thorax pos- 



teriorly, scutellum, dorssal spots on the abdomen, and legs , black. 

 — Length 5,5 mm. 



Cistogaster melanosoma n. sp. 5. — Black , including the 

 <\J antennae, palpi and legs; head whitish; shoulders, pleurae, and 

 last abdominal segment, grey. — Length 6 mm. 



Cistogaster subpetiolata n. sp. $. — Grey ; frontal band , 



stripes on the thorax , first and second abdominal segments and 



