. Occasional papers of the California Academy of Sciences. a transverse fold. The antennal socket is surrounded by a basalflange delimited by an incomplete antennal space between the eye and the mouth cavity isgreatly reduced and its sutures are obsolete. The tentorium of the male is here figured fromthe anterior and posterior aspects (Fig. 5). The ante-rior and posterior arms unite medially and form athin, quadrate corporotentorium. The anterior armsbear small dorsal branches which appear to be vesti-gial. The posterior arms are dilated and join the verylarge crassa, or hypostoma,
. Occasional papers of the California Academy of Sciences. a transverse fold. The antennal socket is surrounded by a basalflange delimited by an incomplete antennal space between the eye and the mouth cavity isgreatly reduced and its sutures are obsolete. The tentorium of the male is here figured fromthe anterior and posterior aspects (Fig. 5). The ante-rior and posterior arms unite medially and form athin, quadrate corporotentorium. The anterior armsbear small dorsal branches which appear to be vesti-gial. The posterior arms are dilated and join the verylarge crassa, or hypostoma, and the inwardly-slant-ing lateral flanges of the submentum. In males theselateral flanges are heavily sclerotized, whereas infemales they are submembranous. The general struc-ture of the tentorium appears to be constant through-out the order. The posterior tentorial pits are situatedon either side of the base of the submentum. ROSS: EMBIA, BIOSYSTEMATICS OF THE ORDER EMBIIDINA, PART 1 11 anterior tentorial ontennol socket anterior orticulatioof mondible. posterior orticulatioof mandible A cepholic aspect anterior tentorial
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectscience, bookyear1890
