"Are they poisonous?"

"No, Mrs. Bowman. Not at all." Guitierrez explained that the swelling in Tina's arm was an allergic reaction. "According to the literature, fourteen percent of people are strongly allergic to reptiles," he said, "and your daughter seems to be one of them."

"She was screaming, she said it was so painful."

"Probably it was," Guitierrez said. "Reptile saliva contains serotonin, which causes tremendous pain." He turned to Cruz. "Her blood pressure came down with antihistamines?"

"Yes," Cruz said. "Promptly."

"Serotonin," Guitierrez said. "No question."

Still, Ellen Bowman remained uneasy. "But why would a lizard bite her in the first place?"

"Lizard bites are very common," Guitierrez said. "Animal handlers in zoos get bitten all the time. And just the other day I heard that a lizard had bitten an infant in her Crib in Amaloya, about sixty miles from where you were. So bites do occur. I'm not sure why your daughter had so many bites. What was she doing at the time?"

"Nothing. She said she was sitting pretty still, because she didn't want to frighten it away."

"Sitting pretty still," Guitierrez said, frowning. He shook his head. "Well. I don't think we can say exactly what happened. Wild animals are unpredictable."

"And what about the foamy saliva on her arm?" Ellen said. "I keep thinking about rabies…"

"No, no," Dr. Guitierrez said. "A reptile can't carry rabies, Mrs. Bowman. Your daughter has suffered an allergic reaction to the bite of a basilisk lizard. Nothing more serious."

Mike Bowman then showed Guitierrez the picture that Tina had drawn. Guitierrez nodded. "I would accept this as a picture of a basillsk lizard," he said. "A few details are wrong, of course. The neck is much too long, and she has drawn the hind legs with only three toes instead of five. The tall is too thick, and raised too high. But otherwise this is a perfectly serviceable lizard of the kind we are talking about."