a vii 
PR oe 
422 INSECTA SAUNDERSIANA. 
Fam. BIBIONID, Haliday. 
Genus PLECIA, Hoffmansegg. 
Piecta BimAcurata, Mas. 
Nigra; thoracis latera, cove femoraque anteriora rufa ; pedes picet ; 
ale nigricantes, venis nigris. 
Black, shining. Thorax red on each side. Legs piceous; anterior 
femora and coxe red. Wings blackish; veins black. Length of the 
body 2} lines; of the wings 4 lines. 
United States. 
Prixrota costais, Fem. 
Nigra, obscura ; ale cinereee aut albide,apud costam nigra, venis nigris 
aut testaceis. 
Black, dull. Wings gray, black towards the costa; veins black. 
Var.—Wings whitish, black towards the costa; veins testaceous, ex- 
cept along the costa. Length of the body 4 lines; of the wings 12 lines. 
Columbia. 
Fam. CHIRONOMID. 
Genus CHIRONOMUS, Fabr. 
Diy. 1. Ale nude. 
Subdiv. 1. Halteres pallidi. 
Cuironomus REDEUNS, Fem. 
Fulva ; antenne fusce; thorax fusco quadrivittatus ; abdomen fuscum 
fasciis canis, sublus fulvum ; pedes testacet, femoribus tibiis et tar- 
sorum articulis apice fuscis ; ale limpide ; halteres testacet. 
Tawny. Antenne brown, tawny at the base. Thorax with four 
brown stripes, the outer pair paler, broader and shorter than the inner 
