GLOSSARY OF SPECIAL TERMS.i 



This glossary is intended to include only such entomological terms as are not easily 

 understood from the figures referred to in the keys throughout the book, and other 

 words only when their meaning in the keys might not be readily ascertained from 

 an ordinary English dictionary. 



Abdomen, the hindermost of the three main body divisions. 

 Adventitious, not regular, accidental or additional. 



Anal, pertaining to the last abdominal segment or to the hind basal angle of the wing. 

 Annulated, incompletely divnded into ring-like joints. 

 Annulus, (-li), a ring or band. 

 Antecoxal sclerite, a part of the metasternum in front of the hind coxae (Coleoptera) 



(PI. 6, fig. 108). 

 Antecubital crossveins, crossveins along the costal border toward the base (Odonata). 

 Antenna (-nae), a pair of jointed appendages of the head above the mouthparts. 

 Appendiculate cell, a small indistinct cell distal to the marginal cell (Hymenoptera). 

 Apterous, wingless. 

 Arcuate, arched like a bow. 



Arculus, a basal crossvein between the radius and cubitus (Odonata). 

 Arista, a bristle-like process at or near the end of the antennae (Diptera). 

 Ar61ium (-ia), a terminal pad of the foot between the claws. 

 Attenuated, gradually tapering. 

 Axrxiliary vein, the subcostal vein of Diptera, anterior to the first longitudinal vein. 



(PI. 12, fig. 258). 

 Axilla (-lae), a triangular sclerite on each side of the scutellum (Hymenoptera) 



(PI. 4, fig. 68. A.) 

 Basal cells, the two cells proximal to the anterior crossvein and the discal cell 



(Diptera) (PI. 12, fig. 258). 

 Bifid, split into two parts. 

 Bilobed, divided into two lobes. 

 Calypteres, small membranous disks under the base of the wings (Diptera) (PI. 



13, fig. 303, c). 

 Capitate, with a distinct knob at the tip. 

 Carinate, ridged, or furnished with a raised line or keel. 

 Caudal filaments or setae, thread-like processes terminating the abdomen. 

 Cell, a space in the wing bounded by veins. 



Cercus (-ci), a pair of short appendages at the end of the abdomen. 

 Cheek, the lateral part of the head between the eyes and the mouth. 

 Chitin, the horn-like material forming the hard parts of the body wall. 

 Clavate, clubbed or enlarged at the tip. 

 Clavus, an oblong basal part along the inner edge of the fore wings (Heteroptera, 



Homoptera) (PI. 13, fig. 316). 



'Where the plural form is unusual the differing termination is given in parentheses added to 

 the last common letter of the root. 



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