EXPLANATIONS OF THE PLATES. 



mep. Erector muscles of the penis. 

 ml. Maxillary lip. 

 mlc. Levator muscles of the coxa. 



mlp. Levator tecti pharyngis or dilatores pharyngis muscles. 

 mop. Occlusor (constrictor) muscles of the pharynx. 

 mrp. Retractor muscles of the penis. 

 mrr. Retractor muscles of the rostrum. 

 mv. Malpighian vessels. 

 mx. Maxillae. 

 n. 1. Nerve to first leg. 

 n. 2. Nerve to second leg. 

 n. 3. Nerve to third leg. 

 n. 4. Nerve to fourth leg. 



ng. Genital nerve. 

 nph. Pharyngeal nerve. 



o. Ova. 

 od. Oviduct. 



ode. Chamber of the oviduct. 

 ce. (Esophagus. 

 ov. Ovary. 



P. Palpus (maxillary). 

 pe. Penis. 

 ph. Pharynx. 



pm. Membranous expansion of the palpus (in Histiostoma). 

 pr. Roof of the pharynx. 



r. Rectum. 



ro. Passage from receptaculuin seininis to ovary. 

 rr. Roof of rostrum. 

 rs. Receptaculuin seminis. 

 sp. Chitinous support of the penis. 

 st. Sternum. 



t. Testes. 

 ia. Tarsus. 

 ten. Tendons. 

 ti. Tibia. 



uc. Urinary concretions. 

 un. Unguis. 



v. Yentriculus. 

 va. Yagina. 

 vd. Vasa deferentia. 



