Aulacigastrid Fliesnot illus

Family Aulacigastridae Identification: Sc complete or nearly so. Costa broken near humeral cross vein and near end of Ri. 2nd basal and discal cells confluent. Oral vibrissae present. Postvertical bristles lacking. Arista pubescent.

This family is represented in the U.S. by a single species, Aulacigaster leucopeza Meigen, a small black fly that occurs from the east coast to Kansas and Texas. It is fairly common and usually found in sap flows.

BEE LICE AND CLUSIID FLIES 295

BEE LICE Family Braulidae Not illus.

Identification: Wingless, 1.5 mm. Coxae widely separated. Abdominal segmentation somewhat obscure. Mesonotum short, resembling abdominal segments. No scutellum.

Braulids are represented in this country by a single very rare species, Braula coeca Nitzsch, which is an ectoparasite of the Honey Bee.

CLUSIID FLIES Family Clusiidae Identification: Sc complete. Oral vibrissae present. 2nd basal and discal cells separated. Postvertical bristles diverging or absent. 2-4 pairs of iron to-orbital bristles. Arista rises near apex of 3rd antennal segment. 2nd antennal segment often with an angular projection on outer side.

Clusiids are small flies, mostly 3-4 mm., that often have brownish or smoky wings. The body color varies but many

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