Xli ENTOMOLOGICAL TERMS. 



0. 



Obcordatcd, thorax, heart-shaped, with the apex to- 

 wards the abdomen. 



Obovate, thorax, &c. inversely ovate, the narrow end 

 downwards, 



Obsolete, indistinct, as if obliterated. 



Obtuse, body, thorax, &c. blunt, rounded at the apex. 



Ocellated, with one or more eyes. 



Ocelli, the same with Stemmata. 



Ocellus, an eye, with a round spot of a different colour 

 in the middle, which is called the pupil. 



Orbiculated, body, the transverse diameter equal to the 

 longitudinal. 



P. 



Palate, the interior part of the transverse lip. 



Palpi, organs placed at the mouth, often articulated, 

 and generally shorter than the antennae, sometimes 

 two only, frequently four, seldom six. 



Pectinated, antennae, sending out from both sides pa- 

 rallel bristles. 



Pectines, in the genus Scorpio, two bodies situated be- 

 tween the abdomen and breast, dentated, or pecti- 

 nated, on one side. See Plate 81. a. 



Pectinicornis, the antennae pectinated. 



Pectus, the under part of the thorax, to which the feet 

 are attached. 



Pedes, a word applied by Linnaeus to the whole limbs 

 of insects, including the femur, tibia, tarsus, and 

 unguis. 



Perfoliated, antennae, knobbed, the knob horizontally 

 split, the pieces connected in the middle. 



Petiolated, abdomen, attached to the thorax by means 

 of a slender elongated tube. 



