74 EXPLANATION OF TERMS 



Lateropharyngeal: applied to the 4th pair of salivary glands in bees; situ- 

 ated on each side of the pharynx. 



Laterostigmatal: situated on the side, immediately above the spiracle. 

 Later oventral: the point of junction of sternum and pleurum. 

 Latero-ventral metathoracic carina: in Odonata; forms the dividing line 



between the metepimera and the metasternum. 

 Latescent: becoming obscure or hidden. 

 Latreille's segment: the first abdominal segment of those Hymenoptera in 



which it is fused with the thorax ; = median segment, propodeon, pro- 



podeum. 



Latticed: cancellate ; q. v. 

 Latus: the side: broad. 

 Latuscula: the facets of the compound eye. 

 Leathery: having the appearance or texture of leather. 

 Lectotype: a co-type chosen, subsequently to the original description, to take 



the place which in other cases a holotype occupies. 

 Leg-s: the jointed appendages attached to the thoracic segments, used in 



walking: the organs of locomotion other than wings: unjointed organs of 



locomotion are pro-legs or false legs ; q. v. 

 Legion: a group of genera, subequal to a tribe. 

 Legnum: the margin of a squama. 

 Lemniscate: ribbon-like: in the form of an 8. 

 Lenticular: round, doubly convex; like a lens or lentil. 

 Lepidoptera: scale-winged: an order of insects with spirally coiled haustel- 



late mouth structures; head free; thorax agglutinate; transformations 



complete ; four scale-covered wings. 



Lepidopteric acid: a green pigment obtained from the wing scales of Lepi- 

 doptera; a derivative of uric acid : see Lepidotic acid. 

 Lepidopteron: a butterfly or moth: one of the Lepidoptera. 

 Lepidotic: set with minute scales. 

 Lepidotic acid: a yellow pigment obtained from certain butterfly scales; a 



derivative of uric acid : see Lepidopteric acid. 

 Lepis: a scale. 



Leprous: with loose, irregular scales. 

 Leptiform: compodeiform ; q. v. 

 Leptos: small, fine. 

 Lethargic: torpid or inactive. 

 Leucine: a white crystalline compound, the product of animal decomposition, 



found in the malpighian tubes : as a color, cheesy white. 

 Leucocytes: pale, unicellular bodies, numerous in the insect blood. 

 Levator: a muscle that raises an organ or a part. 

 Levigate -us: with a smooth, somewhat shiny surface. 

 Liber: free. 

 Ligament: a band or sheet of tough, fibrous tissue between two parts or 



segments. 



Ligneous -eus: wood brown [Vandyke brown]. 

 Lignivorous: feeding upon wood or woody tissues. 

 Ligula: the central sclerite of the labium, borne upon the mentum, usually 



