230 U.S. NATIONAL MUSEUM BULLETIN 261 



ONCOMETOPIA subgenus SIMILITOPIA Schroder, new status 

 Figures 216-219 

 Similitopia Schroder, 1959a:45. Type-species: Oncometopia Juscipennis Fowler, 

 by original designation. 



Characters as in generic description (pp. 220-222), and with tenth 

 abdominal segment (basal segment of anal tube) of male modified 

 to form a pair of conspicuous, large lobes. Geographic distribution 

 Mexico and Arizona. 



Species in this subgenus frequently have an A-shaped dark marking 

 on the crown of the head, but this occurs also in the nominate subgenus. 

 The aedeagus is symmetrical, with or without processes. The type- 

 species is unique in the subgenus in that the posterior pronotal margin is 

 convex. 0. alpha Fowler is peculiar in tliat vein R2+3 of the hindwing 

 is entire. 



An examination of Schroder's lectotype of 0. rufipennis (S ignore t) 

 and of the lectotype of 0. fuscipennis Fowler resulted in the removal of 

 the latter from synonymy under the former. A study of the male 

 genitalia of the lectotype of 0. oaxacae Fowler resulted in its being 

 synonymized, below. The male genitalia of the lectotype of 0. alpha 

 Fowler are as illustrated in figure 218, except that the aedeagus is 

 without the two minute processes. The genitalia of a male specimen, 

 compared with female lectotype of 0. quadrinotata Fowler are as illus- 

 trated in figure 219, except that only one of the aedeagal processes 

 is branched. 



According to Ball, 0. alpha Fowler feeds on pine. 



SPECIES OF ONCOMETOPIA (sIMILITOPIa) 



alpha Fowler, 1899b:232. Arizona, Mexico. 

 fuscipennis Fowler, 1899b:230. Central and S. Mexico. 

 miniatipennis Fowler, 1899b:23I. Central Mexico. 

 quadrinotata Fowler, 1899b:230. N.W and W. Mexico. 

 rufipennis (Signoret), 1855d:797 (Tettigonia) . Central and S. Mexico. 

 oaxacae Fowler, 1899c:234, New synonymy. 



48. Genus HYOGOlSilA Chim 



Figure 220 

 Heterometopia Melichar, 1925a:386, preoccupied. Type-species: Oncometopia 



reticulata Melichar (1925a:386), by original designation and monotypy. 

 Hyogonia China, 1927d:283, as new name for Heterometopia Melichar, 



Length of male 13.4 mm. 



Head strongly produced, its median length about three-fourths its 

 interocular width and less than half its transocular width, anterior 



