556 
Fig. 2. 
Fig. 3. 
Fig. 4. 
Fig. 5. 
Fig. 6. 
Fig. 8. 
Fig. 9. 
Fig. 10. 
Fig. 11. 
Fig. 12. 
Fig. 13. 
The American Naturalist. [June, 
pus; h, haustellum; /. p., labial palpus; 7b, labrum, 
removed and more enlarged. (After Lucas). 
Mystacides punctatus: g, gena; g: t., genal tubercle; 
max. l, remnant of maxillary lobe; mz. p. basal seg- 
ments of maxillary palpus; lb, labrum; h, haustel- 
lum; J. p., labial palpus. 
Micropteryx purpurella: a. f., antennary fossa; md, 
mandible; /b., labrum; g. t., genal tubercle; mz. Pp. 
basal segments of maxillary palpus; mz. l i, elon- 
gated inner lobe of maxilla; Z. p., labial palpus. 
Mieropteryx unimaculella, labium : s-m., Sub-mentum ; 
m., mentum ; l. p., labial palpus. 
Micropteryx wnimaculella, cephalic margin of head, 
showing labrum (lb), mandibles (md), and genal tuber- 
cles (g. t.). 
Micropteryx unimaculella, ventral aspect of right max- 
illa; c, cardo; st, stipes; mz. p. basal segment of 
maxillary palpus; mt. l. e., outer lobe; mz. l i, inner 
lobe. 
Catocala sp: cl, clypeus g, gena; pf., pilifer; mz. p. 
maxillary palpus. : 
Catocala sp., mesal portion of ventral aspect of head: 
gu., gula; Im., labium; l p. labial palpus; ge, gena; 
mx. b., fixed basal portion of maxilla ; mz. p., maxillary 
palpus. i 
Hepialus sp., ventral aspect of head: lm., labium; m. 
mentum; l. p., labial palpus; mz. l, remnant of 
maxillary lobe; mz. p., remnant of maxillary palpus. 
Hadena auranticolor: g., gena; pf., pilifer; mz. p. 
maxillary palpus; ma. l, maxillar proboscis formed 
of elongated maxillary lobes. 
Protoparce carolina ; ep., epicranium; cl, clypeus; lb., 
labrum; ge., gena; md., remnant of mandibles; pf-, 
pilifer. 
Danais archippus: g., gena; lb., labrum; pf., pilifer. 
