. Occasional papers of the California Academy of Sciences. prealar ^ ^ —i ^^i/ _—^!X^ l i -^ ^ l j - i ^ apophyseal pit \ abdominal preepisternum episternumfurcQSternum \ Sternum 2coxa 3 prescutum pleural sutureacrotergite \ wing base i prescutum pleural suture acrotergite abdominal tergum spiracles. spiracle . poststernum prealar suture i preepisternum i coxa 2 spiracli prealar sclerite basisternum trochantin B preepisternum ^ coxa 3 basisternum 1^ abdominal trochantin sternum Figure 16. Meso- and metathorax. lateral aspect of A. Adult female and B. Adult male. abdominal tergum without any ap
. Occasional papers of the California Academy of Sciences. prealar ^ ^ —i ^^i/ _—^!X^ l i -^ ^ l j - i ^ apophyseal pit \ abdominal preepisternum episternumfurcQSternum \ Sternum 2coxa 3 prescutum pleural sutureacrotergite \ wing base i prescutum pleural suture acrotergite abdominal tergum spiracles. spiracle . poststernum prealar suture i preepisternum i coxa 2 spiracli prealar sclerite basisternum trochantin B preepisternum ^ coxa 3 basisternum 1^ abdominal trochantin sternum Figure 16. Meso- and metathorax. lateral aspect of A. Adult female and B. Adult male. abdominal tergum without any apparent developmentof an acrotergite of the latter. The pleura of both thoracic somites are similar (). The pleural suture dorsally contacts the anteriorangle of the scutum and extends ventro-caudad at anangle of about 30 to form the dorsal articulation pointof each coxa. Coxae are located at points directly inline with the posterior angles of the scutum. This dor-so-ventral compression, characteristic of all is associated with life in narrow galleries forit results in a lengthening of the body and a decrease inits vertical plane. On either side of each pleural suture is a narrow epimeron and a slightly broader epister-num. The mesothoracic episternum produces a ven-tra
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectscience, bookyear1890
