Handbook of medical entomology . insects andother normal prey of thespiders, but with little or noeffect on man. There are a very few species,notably of the genus Latrodectus,and possibly including the Euro-pean Chiracanthium nutrix andEpeira diadema, which possess,in addition, a toxalbumen10. A whip-scorpion (Mattigoproctus giganteus). dcrivcd from the general body Half natural size. After Comstock. .• 1 • -u • r ^ • 1 tissue, which is of great virulenceand ma\ even cause death in man and the higher animals. TKE PEDIPALProA OR WHIP-SCORPIONS The tailed whip-scorpions, belonging to the family
Handbook of medical entomology . insects andother normal prey of thespiders, but with little or noeffect on man. There are a very few species,notably of the genus Latrodectus,and possibly including the Euro-pean Chiracanthium nutrix andEpeira diadema, which possess,in addition, a toxalbumen10. A whip-scorpion (Mattigoproctus giganteus). dcrivcd from the general body Half natural size. After Comstock. .• 1 • -u • r ^ • 1 tissue, which is of great virulenceand ma\ even cause death in man and the higher animals. TKE PEDIPALProA OR WHIP-SCORPIONS The tailed whip-scorpions, belonging to the family Thelyphonidae,are represented in the United States by the giant whip-scorpionMastigopractus giganteus (fig. lo), which is common in Florida, Texasand some other parts of the South. In Florida, it is locally known asthe grampus or mule-killer and is very greatly feared. There isno evidence that these fears have any foundation, and Dr. Marxstates that there is neither a poison gland nor a pore in the claw of Poisonous Arthropods THE SCORPIONroA, OR TRUE SCORPIONS The true scorpions are widely distributed throughout warm coun-tries and everywhere bear an evil reputation. According to Comstock(1912), about a score of species occur in the Southern United are comparatively small forms but in the tropics members ofthis group may reach a length of seven or eight inches. They arepre-eminently predaceous forms, which lie hidden during the day andseek their prey by night. The scorpions (fig. 11) possess large pedipalpi, terminated bystrongly developed claws, or chelae. They may be distinguished fromall other Arachnids by the fact that the dis-tinctly segmented abdomen is divided into abroad basal region of seven segments and aterminal, slender, tail-like division of fivedistinct segments. The last segment of the abdomen, ortelson, terminates in a ventrally-directed,sharp spine, and contains a pair of highlydeveloped poison glands. These glands openby tw
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectp, bookyear1915
