Review of the Genus Macrotylus. Feb. 
(Hemiptera) 
E. P. VAN Duzer, Univ. California 
This genus in common with others of the tribe Phylini has the 
arolie parallel with the claws and attached to them, at least at base. 
Here they are large, exceeding the very small claws. Like other 
genera in the division Oncotylaria they have the prosternal xyphus 
convex at base and more or less carinate on the margins at apex. 
In Macrotylus the presence or absence of a hamus in the cell of the 
wings seems to have little significance and an examination of numer- 
ous individuals would possibly show that it may be either present 
or absent in the same species. I have found it present in amenus, 
sexguttatus, regalis, infuscatus and essigi, and absent in tristis, lineo- 
latus and dorsalis. I have been unable to determine this point in 
the unique type of multipunctatus. Our species are mostly hand- 
some, clearly marked insects. They may be distinguished as fol- 
lows: 
Apex of the closed elytra marked with six large white spots 
placed on the outer border of the cuneus and membrane. 1. 
Cuneus without a basal white spot; membrane black with pale 
nervures and sometimes with white marginal spots. 2 
1. Color deep black; head greenish olive; basal spot of the cuneus 
sometimes yellow. 1. 6-guttatus Prov. 
Color pale yellowish-green; cuneus and membrane blackish, 
strongly contrasting with the white spots, size very small. 
2. amenus Reut. 
2. Color above pale testaceous marked with numerous distinct 
round black dots; head deep black with two green dots on 
the base of the vertex; membrane black with two white spots 
beyond the cuneus. 3. multipunctatus n. sp. 
Membrane without white marginal spots, the nervures only 
pale. a 
3. Color clear yellow with a broad black dorsal stripe connecting 
with the black membrane. 4. dorsalis n. sp. 
Color sometimes yellow, then without a black dorsal vitta. 4. 
