342 GLOSSARY. 



Onychium. See Plantula. 



Oval. Egg-shaped. 



Ovate. More or less oval. 



Palpi. The feelers attached to the mouth of insects. 



Pectus. The hreast, or inferior surface of the thorax. 



Petiolated. Narrowed into a handle-like neck ; as the base of the wings 



in Agrion. 

 Phalerated. Marked with stripes and bands like the harness of a horse. 

 Piceous. Color of pitch. 



Pile. Hair; usually hair arranged somewhat in rows. 

 Pilose. Clothed with pile. 

 Plantula. A small lap or membranous appendage between the tarsal 



nails of insects ; also called Onychium. 

 Plicated. Furnished with folds ; folded. 

 Postcostal, or Postcubital. Pertaining to the space between the nodus 



and pterostigma. 

 Posteriorly. Behind ; after. 



Process. A prolongation of the surface, such as an ear-like elevation, &c. 

 Produced. Drawn out ; prolonged. 



Prothorax. The first segment of the thorax. f 



Pruinose. Clothed with bluish or white bloom or powder. 

 Pterostigma. A more or less colored mark upon the anterior margin 



before the apes of a wing, between the costal and the following 



longitudinal vein. 

 Pterostigmatical. Pertaining to the pterostigma, or its locality. 

 Pubescent. Clothed with short, soft, fine hair or down. 

 Punctiform. Shaped like a point or dot. 

 Pyriform. Shaped like a pear. 

 Quadrangular space. The space immediately beyond the basal one and 



in front of the median space of the wings. » 



Radius. The vein just behind the subcostal one. t 



Raptatorial. Adapted for seizing prey. | 



Recurved. Curved backwards. k 



Reniform. Kidney-shaped. f 



Reticulated. Furnished with veining or marking like network. 

 Reticulation. Veining, or marking like the meshes of a net. 

 Rhinarium. The nostril-piece; a portion of the iiasus, or its equivalent 



when reduced in size. 

 Rhombical. Quadrangular, with two opposite angles acute and two 



obtuse. 

 Rhomboidal. Somewhat in the shape of a rhomb. 

 Rufescent. Somewhat reddish. 

 Rufous. Reddish. 

 Rugose. Wrinkled ; furnished with numerous rough, small elevations 



like wrinkles. 

 Rugulae. Minute wrinkles. 

 Rugulose. Minutely wrinkled. 





