4"22 INSECTA SAUNDERSIAXA. 



Fam. BlBIONID.dE, Haliday. 



Genus PLECIA, Hoffmansegg. 



Plecia bimaculata, JJas. 



Nigra ; thoracis latera, coxce femoraque anleriora rufa ; pedes picei ; 

 alcE nigricantes, venis nigris. 



Black, shining. Tboiax red on each side. Legs piceoiis ; anterior 

 femora and coxaB red. Wings blackish ; veins black. Length of the 

 body 2^ lines ; of the wings 4 lines. 



United States. 



Plecia costalis, Fcem. 



Nigra, obscura ; aim cinercce aut albid(B,apud cosfam nigne, venis nigris 

 aut testaceis. 



Black, dull. Wings gray, black towards the costa ; veins black. 

 Var. — AVings whitish, black towards the costa ; veins testaceous, ex- 

 cept along the costa. Length of the body 4 lines ; of the wings 12 lines. 



Colunabia. 



Fam. CHIRONOMID.E. 



Genus CHIKONOMUS, Fahr. 



Div. 1. Alae nudae. 

 Subdiv. I. Halteres pallidi. 



Chibonomus eedeuns, Fcem. 



Fulva ; antenncB fuscce ; thorax fusco quadrivitlatus ; abdomen fuscum 

 fasciis canis, subtus fuivum ; pedes teslacei, femoribus tibiis et tar- 

 sorum articulis apicefuscis ; alee limpidcE ; halteres testacei. 



Tawny. Antennae brown, tawny at the base. Thorax with four 

 brown stripes, the outer pair paler, broader and shorter than the inner 



