177 Pro 



Prothoracis scutum. — The scutum of the proto- 

 thorax. (Gr. protos, first, and thorax, and L. 

 scutum, a shield.) 



Prothoracotheca. — The prothoracic-case, that por- 

 tion of the theca enclosing the prothorax. 

 (Gr. protos, thorax, and theca, a case.) 



Prothorax.^ — The second segment in insects ; the 

 first or anterior segment of the thorax. (L. — Gr. 

 protos, first, and thorax, the breast, breast-plate, 

 chest, etc.) 



Protocerebral lobes. — The head nerve lobes situated 

 in front of the mouth, (Gr. protos, first ; 

 cerebron, the brain; and lohos, a lobe.) See 

 Protocerebron. 



Protocerebron. — The fore brain, consisting of the 

 central masses — the mushroom bodies, optic 

 trunk, and lobes. (Gr. protos, first, and 

 cerehron, the brain.) 



Protopodite. — The fii-st part of the maxilla. (Gr. 

 protos, first, and podos, a foot.) 



Protuberant. — Projecting ; of any irregularity of 

 the surface. (L. protuberafis, from protubero, 

 to bulge out.) 



Proventricular valvule. — The oesophageal valve.(?) 



Proventrieulus. — The fore -stomach ; it is very 

 muscular, being lined with chit in, which is 

 usually provided with numerous teeth arising 

 from the folds. These folds begin in the 

 oesophagus or crop, and end at the commence- 

 ment of the mid-intestine. (L. pro, and 

 ventriculus, the belly.) 



