USED IN ENTOMOLOGY. 



39 



sector of the triangle (Cu i of Comst.) = post-triangular cells: = discal 

 cells. 



Discoidal cell: Hymenoptcra (Norton) ; = ist medial 2, medial 3 and medial 4 

 (Comst.). 



Discoidal field: see discoidal area. 



Discoidal nervule: Lepidoptera ; = media 1 (Comst.). 



Discoidal triangle: Odonata; see triangle. 



Discoidal vein: Diptcra (Schiner), = media 2 (Comst.); = anterior inter- 

 calary vein (Loew) ; Hymenoptcra (Norton), = media 2 (Comst.), beyond 

 the junction with the medial cross-vein: Orthoptera ; the first and largest 

 branch of the humeral vein. 



Discoideous: =discoidal. 



Discolored -orous: a different color from the surrounding, more or less con- 

 trasting ; not concolorous. 



Discota: insects in which development of the adults is from imaginal discs: 

 see adiscota. 



Discrete: distinctly separated. 



Discs: the abdominal motor processes of coleopterous larvae. 



Discus: a disc; a somewhat flat circular part or area. 



Disjoined or Disjointed: see disjunctus. 



Disjunct: with head, thorax and abdomen separated by constrictions. 



Disjunctus: separated; standing apart. 



Disk: the central upper surface of any part; all the area within a margin; 

 the central area of a wing: in Orthoptera, the obliquely ridged outer sur- 

 face of hind femur in saltatoria. 



Dislocated: a stria, band or line interrupted in continuity, when the tips of 

 the interrupted parts are not in a right line with each other. 



Dispersus: with scattered markings, punctures or other small sculptures. 



Disposed: arranged or laid out. 



Dissepiment: a partition wall: applied to the forming septa separating the 

 ccelom-sacs in the embryo ; also the thin envelope about the members in 

 obtect pupre. 



Dissilient: bursting open elastically. 



Distad: toward the distal end. 



Distal: that part of a joint farthest from the body. 



Distant: remote from: standing considerably apart. 



Distichous: applied to antennae when lateral processes originate at the apices 

 of the joints and bend forward at acute angles to them. 



Distiproboscis: the outer third of the proboscis in Muscid flies, bearing the 

 labella. 



Distychus: bipartite: separated into two parts. 



Ditrocha: Hymenoptcra ; that series having the trochanter two- jointed. 



Diurnae: day fliers: applied to butterflies. 



Diurnal: such insects as are active or habitually fly by day only. 



Divaricable: able to spread apart or divaricate. 



Divaricate: straddling or spreading apart: when the wings are lapped at base 

 and diverge behind : tarsal claws when arising at opposite sides of the joint 

 and separating widely. 



