USED IN ENTOMOLOGY. 123 



Sensory: relating to or having a sense function. 



Sensory pittings: deep pits or punctures through the surface, which may or 



may not bear pegs, bristles or setae, and may be open or covered by a mem- 

 brane; serving as organs of perception for sounds or smells. 

 Septa, Septula: in Odonata, the triangular area of the mesonotum before 



the insertion of the primaries : = calli axillary. 

 Septum: an internal division of a body cavity. 



Sequence: the order in which things follow; e. g., species or genera. 

 Seriatim: placed in longitudinal rows. 

 Sericeous: silky : clothed with very dense minute hair which gives a silky 



lustre. 

 Sericterium -ies: the silk-producing gland or glands in caterpillars: the 



spinning structures. 

 Series: a group of species, genera or families, arranged to show agreement 



in a common character which is not of sufficient importance to warrant the 



next higher division. 

 Serific glands: are those which produce a thick, mucous-like secretion which, 



on hardening, forms silk. 

 Serosa: the outer membrane that envelops the forming embryo, the amnion 



and the remainder of the egg. 



Serpentinous: a dirty, dark green [Hooker's green]. 

 Serra: a saw or saw-like part. 

 Serrate: saw-toothed, the teeth set toward one end. 

 Serrato-dentate: toothed, the edges themselves saw-toothed. 

 Serratulate: with little teeth or serrations. 

 Serricornia: that series of Colcoptera in which the antennae are serrate or 



saw-toothed. 



Serriferous: possessing a saw-like ovipositor in the female; the saw-flies. 

 Serrulate: with numerous little saw-teeth. 



Serum: the fluid in which the blood corpuscles float or are suspended. 

 Sesquialter or Sesquiocellus: a large ocellus including a smaller one. 

 Sesquitertial: occupying a fourth part. 

 Sessile: closely seated: the abdomen, when it is closely attached for nearly 



or quite its full width to the thorax. 



Sessiliventres: Hymenoptera in which the abdomen is sessile. 

 Seta-ae: a pointed bristle or long stiff hair: slender, hair-like appendages. 

 Setaceous: bristle-shaped: slender, gradually tapering to a tip. 

 Setarious aristate: the dipterous antenna when the arista is simple. 

 Setiferous: = setigerous ; q. v. 

 Setiform: in the form of a bristle or seta: when a slender short bristle 



arises from a thicker basal joint. 



Setigenous: the hypodermal cells that give rise to setae. 

 Setigerous: bearing setae or bristles; e. g., punctures. 

 Setiparous: producing hair or setae. 

 Setireme: the hairy, oar-like legs of aquatic insects. 

 Setose -ous: bristly or set with bristles. 

 Setula: a small stiff bristle or seta: in Dipt era, the small thorn at the end 



of the subcosta. 

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