76 EXPLANATION OF TERMS 



Lobule: in Coccidcr, one of the two distinct parts of which a lobe is sometimes 

 composed. 



Lobulus: the partly separated portion of the wings of some flies and of secon- 

 daries in some Hymenoptera: also used as = alula ; q. v. 



Lobus: of maxilla = galea : q. v. 



Locomotion: organs of, are legs and wings. 



Longicorn -ia: having the antenna; as long or longer than the body; spe- 

 cifically the Cerambycid beetles. 



Longitudinal: in tne direction of the long axis. 



Longitudinal veins: are those that extend lengthwise through the wing either 

 directly from base or as branches of one that does start there : they are 

 named or numbered, and differently in the different orders. 



Loop: applied to that structure at base of innerside of primaries into which 

 the frenulum of male moths is fitted : see retinaculum. 



Looper: applied to geometrid and other caterpillars in which some or all the 

 middle abdominal legs are wanting and which move by bringing tail to 

 thorax and forming a loop of the intervening segments. 



Lora: the chitinous bands connecting the submentum with the cardo of max- 

 illa (Comst.): the submentum: small cords upon which the base of the 

 proboscis is seated (Say) : the anterior part of the genae at the edge of the 

 mouth : the corneous processes to which the muscles flexing the mouth in 

 certain Diptcra are attached, and in that sense the palpifer of the maxilla : 

 in Homoptera, the small sclerite at side of clypeus and front, extending 

 laterally to the gens. 



Lorum: in bees: the angular piece upon which the sub-mentum rests. 



Lower austral zone: occupies southern part of Lbiited States from Chesapeake 

 Bay to the great interior valley of California. Is interrupted by the con- 

 tinental divide in eastern Arizona and west New Mexico and divided ac- 

 cording to conditions of humidity into an eastern or Austrorip avian and 

 western or lower Sonoran area. 



Lower field: in tegmina ; see costal field. 



Lower fronto-orbital bristles: in Diptcra; are on the lower part of front, 

 above the antenna?, along the orbit. 



Lower margin: of tegmina (Thomas), is the costal or anterior margin ot 

 other authors. 



Lower radial vein: in Lepidoptera (Holland); = media 2 (Comst.). 



Lower sector of triangle: in Odonata; = cubitus 2 (Comst.). 



Lower sonoran faunal area: comprises the most arid deserts of North 

 America, beginning west of lat. 98 in Texas : sends narrow arms into 

 southern New Mexico, is interrupted by the Continental Divide; covers a 

 large part of w. and s. Ariz., s. w. New, s. w. Calif., a portion of central 

 Calif., and most of Lower Calif. These areas are irregular and incapable 

 of brief definition. 



Lubricate -ous: covered with a slippery mucus. 



Lucid: shining ; applied to luminous insects. 



Luciferase: a substance in the nature of an enzyme, existing in the luminous 

 organs of light-giving beetles. 



