THE ENITHARES (Hemiptera-Heteroptera: Notonectidae) OF THE ...

396 Pacific Insects Vol. 10, no, 2
clavus and median area of corium grayish. Outer margin of corium streaked with yellowish
brown and black. Opaque zone of membrane black, anterior and posterior lobes hyaline. Abdomen
ventrally black with lateral margins yellowish brown. Both forms with eyes black
flecked with brown. Legs brown.
Structural characters : viewed dorsally head rounded. Greatest width of head about 4/5
pronotal humeral width, 3X or more anterior width of vertex in # ; £ just less than 3X ; and
about 2.5X median head length. Synthlipsis about 1/2 anterior width of vertex. Median head
length slightly greater than anterior width of vertex and 6/7 median pronotal length in # ; #
head length equaling pronotal median length. Pronotal humeral width variable, can be either
less, equal to or more than 3X median length; lateral margins diverging, about 2/3 median
length ; posterior margin convex, centrally emarginate. Dorsal margin of pronotal fovea directed
laterad from behind eyes (fig. 145). Lateral margins of pronotal fovea of -?• produced
towards posterior margin of eyes (fig. 148) # not so (fig. 146). Nodal furrow long, upper 1/3
clearly bent cephalad, less than its own length removed from membranal suture. Both sexes
with ventral surface of connexivum of 1st 2 visible sternites with a series of transverse ridges
along inner margin (fig. 147). Mesotrochanter angulate (fig. 140), chaetotaxy of