GLOSSARY. 



In entomology, the last two segments 

 of the abdomen. In conchology, a de- 

 pression of the posterior side near the 

 hinge of bivalves. 



Aorta. The great artery, or trunk of the 

 arterial system, in animal bodies. It 

 proceeds from the left ventricle of the 

 heart, and gives origin to all the arte- 

 ries except the pulmonary. 



Aortal ; Aortic. Pertaining to the aorta. 



Aperture. A hole, cleft, or chasm ; any 

 opening, as the mouth of a shell, from 

 which the head of the animal pro- 

 trudes. 



Apex. The top or termination of any 

 part. In conchology, the top or point 

 of the spiral cone. The term has no 

 regard to the natural position of a 

 shell, but is used mathematically to 

 express the nucleus or first-formed 

 part : from this point the shell rapidly 

 or slowly enlarges as it descends, and 

 takes a spiral, arcuated, straight, 

 oblique, convolute, or irregular course. 



Aphidian. Pertaining to the Aphis or 

 plant-louse. 



Aphid ivorous. Subsisting on the Aphis, 

 or plant-louse : a term applied to the 

 larva and imago of many insects. 



Apiary. The shed, stand, or other place 

 where bees are kept. 



Apical. Belonging to the apex or point- 

 ed end of a cone-shaped body. 



Apiculate. Terminating suddenly in a 

 small, filiform, truncate apex. 



Apodal. Without feet or locomotive or- 

 gans : fishes are so called which have 

 no ventral fins. 



Apopkysis. An execresence. 



Appeiidicula. A small piece sometimes 

 appended to the upper lip of an insect. 



Append 'iculate. When from one of the 

 joints of an insect there issues an ac- 

 cessory joint or appendage ; when the 

 appendages have one or two antenni- 

 form processes at their base. 



Applicant. Applied to insects' wings 

 when at rest they are parallel with the 

 abdomen. 



Approximate. When the teeth of insects 

 are so arranged in the jaws that there 

 is no intervening vacancy ; or when 

 their legs are near each other at the 

 base. 



Apterous. Wingless ; applied to insects 

 which have no wings. 



Aquatic. Pertaining to water: applied 

 to animals which live in water, as 

 fishes; or to such as frequent it, as 

 aquatic birds. 



Arachnoid. Formed like a spiders web. 



Arboreal; Arboreous. Belonging to trees ; 

 resorting to, or dwelling in, trees. 



Arborescent. Branched, or bearing some 

 resemblance to a tree. 



Arctic. Pertaining to northern regions ; 

 as the arctic pole or sea. 



Arcuate. Linear and bent like a bow. 



Arcuated. Bent in the form of an arch. 



Area. The surface between given lines 

 or boundaries. 



Areate. When the mesothorax of an in- 

 sect is larger than the prothorax, and 

 terminates towards the wings in two 

 oblique areas, inclosed by a ridge 

 often crowned anteriorly with little 

 teeth. 



Arenose. Sandy ; having the appearance 

 of being sprinkled with sand. 



Areolar. Consisting of, or marked with, 

 numerous small circles. 



Areolate. Marked with lines which in- 

 tersect each other in various directions, 

 so as to exhibit the appearance of net- 

 work ; when the surface of the wings 

 is divided into various areolets. 



Arcola. A small area or circle. 



Areolet. An extremely small circle. 



Argent. The splendor of silver ; as the 

 spots on the under sides of the wings 

 in Argyanis Lathonia, &c. 



Arislate. Antenna} terminated by a va- 

 riously shaped flat joint, longer and 

 usually larger than the preceding one. 



Armature. Horns, spinous processes, or 

 whatever else animals are furnished 

 with for their defence. 



Armillate. When a leg, antenna, &c. of 

 an insect is surrounded by a broad 

 ring of a different color. 



Aromatic. Having a pungent scent of 

 spices. 



Artlirium. The fourth joint of the tarsi 

 of insects. 



Arthroidtd. A term denoting that form 

 of joint, or species of articulation, in 

 which the head of one bone is received 

 into the shallow socket of another. 



