. Occasional papers of the California Academy of Sciences. Development Adult female embiids exhibit little change in ap-pearance from first instar nymphs except, of course,for increased size and coloration. Ventrally, the eighthand ninth abdominal paragenital stemites adjacent tothe vulvas opening are modified, as is, of course,maturation of internal reproductive organs. Neoten-ic apterous males usually are similarly nymphoid but,as adults, are more melanic, or pigmented, and havedistinct cranial and abdominal terminalia characters. Males destined to have wings show the first ex-ternal evidenc
. Occasional papers of the California Academy of Sciences. Development Adult female embiids exhibit little change in ap-pearance from first instar nymphs except, of course,for increased size and coloration. Ventrally, the eighthand ninth abdominal paragenital stemites adjacent tothe vulvas opening are modified, as is, of course,maturation of internal reproductive organs. Neoten-ic apterous males usually are similarly nymphoid but,as adults, are more melanic, or pigmented, and havedistinct cranial and abdominal terminalia characters. Males destined to have wings show the first ex-ternal evidences during an early nymphal instar. Atfirst they are merely very slight extensions of the pos-terior angles of the meso- and metascuta (Fig. 21 A).These are accompanied by increased development ofcertain setae near, and on, the lateral margins of thenota. The enlarged angles somewhat increase in sizeduring the Figure 20. As eggs are laid on the sides of culture jars,their number and imbedding sequence can be surcouji Navas, Mozambique. Figure 21. Wing development of a typical male nigra Hagen. In the next instar definite wing pads appear (). Those of the mesothorax nearly reach the an-terior margin of the metanotum. The lateral notalsetae now have increased in number and mark cours-es of future wing veins. Development of the specialradius blood sinus vein (RBS) is indicated in somespecimens by faint fleshy, reddish lines which bor-der RBS in the adult wing. As in the previous instar,there is pad enlargement during the stadium. 16 OCCASIONAL PAPERS OF THE CALIFORNIA ACADEMY OF SCIENCES, NO. 149 In the next (penultimate) instar (fifth?) (Figs. 13,21C, 22), the wing pads are well developed and great-ly elongated; those of the mesothorax overlap mostof the metascutum, the pads of which extend caudal-ly over most of the second abdominal scutum. Theyare broa
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectscience, bookyear1890
