USED IN ENTOMOLOGY. 



9 1 



Ocular sclerite: the first or protocerebral segment of the head. 



Ocular tubercles: in Aphids, are a group of prominent facets on the hinder 

 part of each eye. 



Oculi-us: the eyes: an eye: refers to the compound eyes. 



Oculocephalic: applied to that pair of imaginal buds destined to produce the 

 cephalic region in Hymenoptcra. 



Odona: toothed: applied to Odonata by Fabricius because of the long teeth 

 on the maxilla and labium. 



Odonata: net-veined insects with mandibulate mouth; head free; thorax ag- 

 glutinate ; wings similar, elongate, flat ; metamorphosis incomplete ; copula- 

 tory organs of male near base of abdomen, separate from the testes. 



Odonate: bearing toothed mouth parts, like those of dragon flies. 



Odoriferous: diffusing an odor; applied to glands or secreting organs. 



(Ecology: see ecology. & * # . CU^U* 



OZdagus: the penis. - 



(Enocytes: large yellow cells arranged segmentally in clusters, in each side 

 of body cavity ; associated with blood and fat bodies. 



(Esophageal bone: a plate below anterior part of oesophagus in Psocidco. 



Oesophageal bulb: = sub-clypeal pump; q. v. 



(Esophageal diverticula: = f ood reservoirs (q. v.); but more generally ap- 

 plied also to any sac-like structure connected with the gullet. 



(Esophageal lobes: form posterior portion of brain or tritocerebrum. 



Oesophageal valve: a funnel-like folding of the oesophagus, extending into the 

 chylific ventricle in some insects, and forming a valve that controls the 

 entrance of food into that organ : = cardiac valvule. 



Oesophagus: the gullet: that part of the alimentary canal between the mouth 

 and the crop. 



Olfactory: pertaining to the sense of smell: those lobes of the deutocerebrum 

 from which the nerves supplying the antennae arise. 



Oligonephria: applied to insects with few urinary (Malpighian) tubes. 



Oiigoneura: having few wing veins: specifically applied in Diptera to Cecido- 

 myids. 



Olivaceous: with a tinge of olive-green, usually as a shading [olive green]. 



Omaloptera: the pupiparous flies. 



Omia: the shoulders: the lateral anterior angles of an agglutinated thorax, 

 when they are distinct: = see umbone : in Coleoptera; a corneous sclerite 

 to which the muscles of the anterior coxa are attached ; also the lateral 

 margin of the prothorax ; also the lateral margin of the scutellum in Cara- 

 bids and Dytiscids. 

 Ommateum: the compound eye. 



Ommatidium -ia: one of the elements of which the compound eye is com- 

 posed. 

 Omnivorous: a general feeder upon animal or vegetable food, or both. 

 Oncus-i: a welt: applied to welt-like ridges on caterpillars. 

 Onisciform: shaped like a wood-louse, Oniscus sp. ; applied to certain Ly- 



c.inid and other caterpillars. 

 Ontogenetic: relating to the development ■>!' the individual. 



