AMERICAN APTERA. 307 



EXPLANATION OF PLATE VIII. 



(CAMERA LUCIDA DRAWINGS.) 



Fig. 1. Lxmobothrium gypsis Kell.-Labi.tim [lab.) with maxillary forks (/.) and 



hypopharynx {hyp.) projecting above it; pi., labial palpus. 

 Fig. 2. Lxmobothrium gypsis ~K.e\\. — Maxilla; I. apical maxillary lobe ; mx. body 



of maxilla (stipes); pi. maxillary palpus. 

 Fig. 3. Lxmobothrinm gypsis Kell. — Oesophageal sclerite (ce. scl.) and lingual 



gland (gl.) of right side. (Left gland removed to show anterior eud 



of left arm of sclerite) ; d. duct. 

 Fig. 4. Lxmobothrinm gypsis Kell. — Mandibles, ventral view. 

 Fig. 5. Ancistrona gigas Praget. — Labium and maxillffi, ventral view; I. apical 



lobe of maxilla; lab. labium ; mx. body of maxilla fused with edge of 



labium; pi. maxillary palpus. 

 Fig. 6. Ancistrona gigas Praget. — Epipharynx and its supporting fork. 

 Fig. 7. Ancistrona gigas Praget. — Maxillary forks; p.m. protractor muscles; r. 



m. retractor muscle. 

 Fig. 8. Ancistrona gigas Praget. — Mandibles, ventral view. 

 Fig. 9. Peripsocus califomicus Banks. — Labium, ventral view; pi. palpus. 

 Fig. 10. Peripsocus califomicus Banks. — Maxilla; /. apical maxillary lobe; mx. 



body of maxilla (stipes) ; pi. palpus; plf. palpifer. 

 Fig. 11. Troctes divinatorius Mull — Labium, ventral view ; pi. palpus. 

 Fig. 12. Troctes divinatorius Mull. — Maxilla and maxillary fork of ride side, ven- 

 tral view ; ep. epicranium ; /. maxillary fork ; I. apical maxillary lobe ; 



mx. body of maxilla; pi. maxillary palpus; p. m. protractor muscles; 



r m. retractor muscles. 

 Fig. 13. Troctes divinatorius Mull. — Mandibles, dorsal view. 

 Fig. 14. Peripsocus califomicus Banks. — Mandibles, ventral view. 

 Fig. 15. Peripsocus califomicus Banks. — Maxillary fork. 

 Fig. 16. Peripsocus califomicus Banks. — Oesophageal sclerite (ce. scl.) and lingual 



glands (gl.), ventral view; d. duct; ped. peduncle of gland. 



TRANS. AM. ENT. SOC. XXXI. AUGUST, 1905. 



