fusca group species
begin page 24..... ÉTUDE DE LA MORPHOLOGIE
summary
The most important features to differentiate the species:
measurement
width of the head
length of the alitrunk
FIGURE 10.15. Illustration of some steps biornétriques.
10 head. 11 alitrunk. 12, scape of the antenna. 13
posterior surface of a petiole. 14, lateral profile of a petiole.
sculpture and coloration of integument
microreticulem (often on the head)
punctation (often on the head)
pubescence (often the head and gaster)
occipital angles
length and curvature of the line revealed when the head is viewed from the front
-long or short
-weak or strongly rounded
dorsal margin of petiolar tergite - margin for the axis longitidinal to the body, determined by the two lateral points where the sides of tergite begin to converge toward one another to form this margin. The straight line through these two points defines the base of the summit the petiolar tergite and the margin may be:
high or low
concave, straight, convex, angulo-convex or angular (Fig. 22-29)
teeth of the mandibles - presence or absence of basil dentition
sternal structures (hidden by the legs)
sagittal profile of mésométasternum
presence or absence of métasternale protuberances
hairiness of metasternum
15. Ventral view of mésométasternurn; two protuberances métasternales are indicated by arrows, the hair is not shown.
Fundamental Types profile of rnésométasternum, illustrated hairless. 33 profile with bulge métasternale. 34 profile intermediate with a convexity high and average width without protuberance. 35 Low profile and long, without protuberance.
length of bristles anterior paracarénales is distinctive among some species
Faces and hair of the femurs. 5. Figure showing the faces of the femur: al = anterolateral, d = face dorsal, pl = postero-lateral, v = ventral. 6. Hairiness present on all four sides of the femur (cross section).7. Hairs present on the posterolateral sides and belly. 8. Hairs present on the ventral side only.
