USED IN ENTOMOLOGY. 147 



female, opening externally to admit the passage of the egg to the ovi- 

 positor : receives the penis of the male in copulation and is sometimes 

 called oviduct : " every part, the office of which is to cover, protect or 

 defend the tongue " : " the bivalve coriaceous sheath or cover of the 

 spicula " : generally, a sheath. 



Vaginata: sheathed: an obsolete ordinal term for Coleoptera. 



Vaginate: inclosed in a bivalved sheath. 



Vagus: sympathetic nervous system; q. v. 



Valgate: enlarged at bottom: club-footed. 



Valve or Valvulae: the expanded plate-like galea of the maxilla in many 

 Hymcnoptcra. 



Valve: a small, transverse or triangular piece behind the last full ventral 

 segment, at base of plates in d Jassidcu and allies. 



Valves: in Orthoptera, the corneous pieces of the ovipositor; : corniculi : 

 in Lcpidoptera, sometimes used to = harpes ; q. v. 



Valvula: = vagina in its application to Dipterous mouth parts. 



Valvulae: in Hymcnoptcra, branches of the genital forceps of male. 



Valvular: when two parts join so as to form a valve between them. 



Valvular process: in Odonata, a slender, tmjointed process at the apex of 

 each genital valve. 



Valvule: any small, valve-like process. 



Variation: a departure in color or form, from the normal: the sum of the 

 departures from a mean type of any species : it is continuous when there 

 is no break between the extremes ; discontinuous when there are gaps with- 

 out intermediate forms. 



Variety: any departure from the normal type of a species which, while re- 

 taining the specific characters, is yet recognizably different because of 

 climatic, seasonal or other influences ; may occur with the type form or as 

 a geographical race. 



Variola: a deep, rounded impression with defined edges. 



Variolate -ose: with large, rounded impressions like pock-marks. 



Vas deferens: = vasa deferentia ; q. v. 



Vasa deferentia: tubes from the seminal vesicles or testes of each side, 

 which usually unite into a single ductus ejaculatorius ; q. v. 



Vasa varicosa: the malpighian tubules. 



Vascular: relating to the blood-vessels or circulatory system. 



Vasiform orifice: in Aleurodidce, an ovate, triangular or semicircular opeiv- 

 ing on the dorsum of the last abdominal segment. 



Veinlets: in Orthoptera, are the minute transverse ribs or ridges between 

 the longitudinal veins. 



Veins: the chitinous, rod-like structures supporting the wings, and especially 

 those extending longitudinally from base to the outer margin: == nerves ; 

 nervures ; nervules. 



Velum: a membranous appendage of the spurs at the apex of anterior tibia: 

 in bees a broad process at inner end of fore tibia. 



Velum penis: the thin membranous covering of the male intromittent organ: 

 also applied to other covering or shield-like structures of the penis. 



