. A manual for the study of insects. Insects. INSECTS AND THEIK NEAR RELATIVES. 15 AA. Abdomen unsegmented. B. Abdomen joined to the cephalothorax by a short, narrow stalk. {Spiders.) p. 20 Araneida. BB. Abdomen fused with the cephalothorax. {Mztes.) p. 42. ACARINA. Order SCORPIONIDA (Scor-pi-on'i-da). The Scorpions, With the scorpions (Fig. 8), the body is divided into a compact, unsegmented cephalothorax, and a long, segmented abdomen. The abdomen is divided into two portions : a broad pre-abdo- men, consisting of seven segments ; and a slenderer tail-like division, the post-abdomen, consist
. A manual for the study of insects. Insects. INSECTS AND THEIK NEAR RELATIVES. 15 AA. Abdomen unsegmented. B. Abdomen joined to the cephalothorax by a short, narrow stalk. {Spiders.) p. 20 Araneida. BB. Abdomen fused with the cephalothorax. {Mztes.) p. 42. ACARINA. Order SCORPIONIDA (Scor-pi-on'i-da). The Scorpions, With the scorpions (Fig. 8), the body is divided into a compact, unsegmented cephalothorax, and a long, segmented abdomen. The abdomen is divided into two portions : a broad pre-abdo- men, consisting of seven segments ; and a slenderer tail-like division, the post-abdomen, consisting of five seg- ments. At the end of the post-abdo- men there is a large poison-sting, which appears like a segment. The mandibles and the palpi are provided with pincers. As the palpi are very large, with stout pincers, they resem- ble in a striking manner the great claws of lobsters. The cephalothorax bears from three to six pairs of eyes. Scor- pions breathe by means of lung sacs, of which there are four pairs, opening on the lower side of the third to the sixth abdominal segments. Full-grown scorpions possess a pair of comb-like organs on the lower side of the second abdominal segment. The function of these organs is not yet known. The sexes of scorpions differ in that the male has broader pincers and a longer post-abdomen. Scorpions do not lay eggs, the young being developed within the mother. After the birth of the young, the mother apparently shows great regard for them, carrying them about v/ith her for. Fig. 8.—A Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Comstock, John Henry, 1849-1931; Comstock, Anna Botsford, 1854-1930. joint author. Ithaca, N. Y. , Comstock Pub. Co.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsects, bookyear1895
