i34 EXPLANATION OF TERMS 



Obovate, inversely egg-shaped, the narrow end downwards or 



towards the base. 



Obsolete, indistinct ; inconspicuous. 

 Obtect, (pupa) wrapped in a crustaceous covering. 

 Obtuse, blunt; ending in a segment of a circle. 

 Occiput, the hinder part of the head : the part behind the vertex. 

 Ocellate, applied to the eye-like spots on the wings of Lepidop- 



terous insectsus, ually formed of a differently coloured iris or 



ring, inclosing one or more small spots. 

 Ocelli, the stemmata. 

 Oculi, the eyes. 



Ochreous, yellow with a slight tinge of brown. 

 Onychii, two or three small processes between the unguis at the 



termination of the tarsus. See pulvillus. 

 Operculum, a lid ; a small valvular appendage. 

 Opposite, placed on the side opposite to another, so that the bases 



01 the two are on the same transverse line. See alternate. 

 Orbicmar, round and flat, the diameters of the plane equal. 

 Orbit, an imaginary border around the eye. 

 Order, the subdivision of a class. 

 Os, the mouth and its parts. 

 Oval, somewhat egg-shaped, but the outlines of the ends are 



equal. See ovate. 

 Ovate, shaped like the longitudinal section of an egg, the outline 



of the ends being unequal. 

 Oviduct, the instrument and appendages with which the female 



deposits her eggs. See aculeus. 

 Oviposition, the act of depositing eggs ; the manner in which 



eggs are deposited. 



Oviparous, propagating by means of eggs. 

 Ovoviviparous, producing living young, the eggs being disclosed 



in the matrix of the parent. 



P. 



Palate, the interior part of the transverse lip. 



Pagina inferior, the lower surface of a wing. 



Pagina superior, the upper surface of a wing. 



Paleaceous, chaffy. 



Pallide-flavens, pale or whitish yellow. 



Pallidus, of a pale cadaverous hue. 



Palma, palm ; the basal tarsal joint of the anterior feet, some- 

 times furnished with strigilis. See manus. 



Palmate, hand-shaped ; cut down nearly half-way to the base 

 into subequal, oblong segments, leaving an entire space like 

 the palm of the hand. 



