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

366 Pacific Insects VoL 10, no. 2
55 (54). Metaxyphus centrally depressed, lateral margins raised and thickened, infuscated
dark brown-black (fig. 60 & 61) simplex (Kirby)
Metaxyphus not as above 56
56 (55). Dorsal margin of pronotal fovea curving laterad from posterior margin of eyes,
tomentose area hardly visible bergrothi Montandon
Dorsal margin of pronotal fovea directed caudad from posterior margin of eyes,
tomentose area clearly visible 57
57(56). Head narrower than anterior pronotal angles maai n. sp.
Head wider than anterior pronotal angles freyi quadrispinosus Lansbury
58(54). Basal lateral margins of metaxyphus divergent, raised and infuscated Sinica (Stal)
Basal lateral margins of metaxyphus not as above 59
59 (58). Dorsal margin of pronotal fovea curving laterad from posterior margin of eyes,
tomentose area hardly visible bergrothi Montandon
Dorsal margin of pronotal fovea directed caudad from posterior margin of eyes,
tomentose area clearly visible 60
60 (59). Viewed laterally, lower margin of pronotal fovea raised, appearing as a projection
when viewed from above (fig. 320) martini Kirkaldy
Viewed laterally, lower margin of pronotal fovea rounded, not appearing as a projection
when viewed from above 61
61(60). Not more than 8.5 mm long intricata Breddin
Larger, at least 8.75 mm long 62
62(61). Head almost 3X median length rogersi Distant
Head never more than 2.75X median length 63
63 (62). Basal lateral margins of metaxyphus parallel, apically convergent
vicintricata n. sp. & ciliata (F.)
Lateral margins of metaxyphus convergent from base to apex
freyi quadrispinosus Lansbury
Enithares stridulata Brooks Fig. 9-14.
Enithares stridulata Brks., 1948, J. Kans. Ent. Soc. 21 : 37-38, pl. 1, fig. 1.- Lansbury, 1964, Ann.
Zool. Warsz. 22: 210-11, fig. 4a-d.