76 EXPLANATION OF TERMS 



Lobule: in Coccidcc, one of the two distinct parts of which a lobe is some- 

 times composed. 



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

 ondaries 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 antennae as long or longer than the body; spe- 

 cifically the Cerambycid beetles. 

 Longitudinal: in the 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 inner side of primaries into which 



the f renulum 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 

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

 the proboscis is seated (Say) : the anterior part of the gense 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 Homoptcra, the small sclerite at side of clypeus and front, 

 extending laterally to the gense. 



Lorum: in bees; the angular piece upon which the submentum rests. 

 Lower austral zone: occupies southern part of United States from Chesa- 

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

 the continental divide in eastern Arizona and west New Mexico and divided 

 according to conditions of humidity into an eastern or A us tro riparian and 

 western or low'er Sonoran area. 

 Lower field: in tegmina : see costal field. 

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



above the antennae, along the orbit. 

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



other authors. 



Lcwer radial vein: in Lcpidoptcra (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. Nev., 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. 



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

 organs of light-giving beetles. 



