absent

Eyes:

smooth

Labial palpus:

upcurved

Labial palpus modification:

Labial palpus variable in length, segments II and III usually rough and clothed with long, piliform scales.

Maxillary palpus:

present

Proboscis:

present

Proboscis texture:

scaled

Proboscis description:

Proboscis usually elongate, 1.5-2.5X the length of labial  palpus; reduced, about equal to labial palpus in  some African Ceromitia; basal 1/4 - 1/3 scaled.

Mandibles:

reduced

Head vertex scaling:

very rough

Female antennae:

filiform

Male antennae:

filiform

Male scape description:

Scape sometimes slightly swollen in male.

Antennal sensillum:

Antennal sensillum present

Sensillum vesiculocladum:

absent

Asciod sensilla:

absent

General antennae description:

Antennae usually longer than forewing in both sexes; up to  3X length of forewing and arising nearly contiguous in males;  antennae shorter in genus Cauchas, 0.5- 1.2X the length  of forewing in both sexes; pecten usually present, ab-  sent in Cauchas; flagellum filiform, usually fully  scaled to apex with two annuli of appressed  scales per segment, more thinly scaled ventrally;  basal 0.2-0.6 of antenna roughly scaled in some  Adela. Males of some Adela and all Nemophora with  variable number of enlarged mediodorsal spines along base of flagellum.

Adult head description:

Vertex rough, densely covered with piliform scales: frons usually rough, occasionally covered by smooth, broad scales. Eyes small to  large, interocular index 0.5-1.7; interfacetal microsetae scattered; eyes dimorphic in most Adela and Nemophora with that of males enlarged, more approximate at vertex, and usually with facets in upper 2/3 of eye enlarged. Maxillary palpi 2-5-segmented.