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bulletin: museum of compaeative zoology. 



transversely striated in a very characteristic manner (PI. 18, fig. 

 117). They Ue just back of head, are narrow near median line, 

 widening as they pass laterally directly across the dorsal surface, 

 thence passing to ventral surface Avhere they bend anteriorly (PI. 

 18, fig. 116) on the ventral side of head, and terminate near the 

 median line about half way between their posterior portions and the 

 tip of snout. 



Length of body commonly 4 to 15 cm.; width 2 to 6 mm. 



Ocelli.— \]^vi2,\\y 12 to 20 

 (occasionally 25 to 30) large 

 ocelli lie on each side of head, 

 arranged in an irregular, elon- 

 gated cluster or very irregular 

 row on each antero-lateral mar- 

 gin, and extending inward in 

 the brain region behind the 

 dark cephalic markings (PI. 18, 

 fig. 117). 



Color. — Dorsal surface of 

 body back of head deep red, 

 brownish red, or brownish 

 orange, sometimes with a more 

 decided tinge of yellow. Head 

 whitish or flesh color, with two 

 angular or oval, black or very 

 dark brown spots, placed sym- 

 metrically on dorsal surface 

 (PI. 2, fig. 21). A narrow 

 longitudinal line of dark color 

 often occurs in median line on 

 dorsal surface of esojjhageal 

 region. Mr. Abbott informs 

 me that in some specimens the 

 nuchal groove above described 

 is purplish in color, shading 

 He also states that the poste- 



FiG. 48. — Amphiporus bimaculatiis. Out- 

 line of stylet apparatus of proboscis, with 

 four pouches of accessory stylets. 



gradually into the red color of body. 



rior tip of body is often distinctly white in color. 



Whole ventral surface pale reddish, pale orange, or flesh color. 



Proboscis. — In the California specimens there are either two or 



