Physical Characteristics

Length of head and body up to 5.1 in (130 mm); color of head shield variable, trunk tergites yellow or brown with a dark band along posterior margin; cluster of four ocelli on each side of head shield; 17-23 (usually 18-21) antennal articles; maxilli-

pedes with a pair of tooth plates, each usually with five teeth; 21 pairs of trunk legs; tracheae open to triangular spiracles above legs on segments 3, 5, 8, 10, 12, 14, 16, 18, and 20; pair of median sulci on trunk tergites 2-20; prefemur of last leg with five rows of small spines (two rows on dorsal side, three rows of usually three spines on ventral side); prefemur extended as a process with 2-6 spines on its apex.

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