322 



Annals Entomological Society of America [Vol. XV, 



Hine, J. S., 1898. The North American ST:iecies of the genus Bittacus. Jour. 

 Columbus Hort. Soc, Vol. 13, pp. 105-116; pis. 1-2. 

 1901. A review of the Panorpidce of America North of Mexico. Bull. 

 Sci. Lab. Denison Univ., Vol. 11, pp. 241-264; pis. 59-61. 

 MacGillivraj', A. D., 1912. The lacinia in the maxilla of the Hymenoptera. Ann. 



Ent. Soc. Am., Vol. 5, pp. 231-237; pi. 18. 

 Miyake, T., 1913. Studies on the Mecoptera of Japan. Jour. Coll. Agr., Imp. 



Univ., Tokyo, Vol. 4, pp. 265-400; pis. 18-37. 

 Packard, A. S., 1889. On the occurrence of taste organs in the epipharynx of the 



Mecoptera. Psyche, Vol. 5, pp. 159-164. 

 Peterson, A., 1916. The head-capsule and mouth-parts of Diptera. III. Biol. 



Monographs, Vol. 3, pp. 1-112; pis. 1-25. 

 Yuasa, H., 1920. The anatomy of the head and mouth-parts of Orthoptera. 

 Jour. Morphology, Vol. 33, pp. 251-307; pis. 1-9. 



LIST OF ABBREVIATIONS. 



a — antenna. 



aa — antacolla. 



af — antafossa. 



an — antacoria. 



ar — antennaria. 



ca — cardo. 



cc — cervicoria. 



CCS — cervepisternum. 



ce — compound eye. 



ct — corpo tentorium. 



dd — distadentes. 



ea — epicranial arm. 



et — extenso tendon. 



ex — epipharynx. 



fc — fronto-clypeiis. 



fl — flagellum. 



hx — hypopharynx. 



gl— galea. 



gn — genaponta. 



1 — labrum. 



Ic — labicoria. 



li — labium. 



lo — lateral ocellus. 



Ip — labial palpus. 



mc — maxacoria. 



md — mandible. 



mg — raecaglossa. 



mn — metatentorina. 



mo — median ocellus. 



mp — maxillary palpus. 



mt — metatentorium. 



oc — occiput. 



od — odontoidea. 



of — occipital foramen. 



ol — oculata. 



p — pedicel. 



pa — postgena. 



pf — palpifer. 



pn — pretentorina. 



pox — postpharynx. 



pp — palpiger. 



pr — precoila. 



pt — preten corium. 



ptc — postartis. 



ptl — postcoila. 



py — preartis. 



rt — recto tendon. 



s — stipes. 



sc — scape. 



sld — salivary duct. 



sm — submentum . 



so — salivos. 



St — supratentorium. 



V — vertex. 



EXPLANATION OF PLATES. 



Pl.\te XXV. 



Panorpodes oregonensis, cephalic aspect of head. 



Bittacus strigosus, cephalic aspect of sinistral mandible. 



Bittacus strigosus, cephalic aspect of head. 



Boreus nivoriundus, caudal aspect of sinistral mandible. 



Apterohittacus apteriis, cephalic aspect of head. 



Apterobittacns apterus, cephalic aspect of sinistral mandible. 



Merope tuber, cephalic aspect of head. 



Bittacus strigosus, caudal aspect of sinistral mandible. 



Merope tuber, cephalic aspect of sinistral mandible. 



