203 

 Since I. chiasticus is apparently isolated from I. q. 



quadripunctatus , has a distinctive color pattern, and no 



distinguishing morphological characters, including 



genitalia, it is reduced in rank to a subspecies of I. 



quadripunctatus (Olivier) . If future studies produce 



intermediate populations, then I. chiasticus should be 



considered another of the I. quadripunctatus color patterns. 



Biology . Suspected biology as discussed under the species 



account . 



Remarks . Ischyrus quadripunctatus chiasticus differs 

 from "graphicus" in having a free comma-shaped subhumeral 

 spot, scutellar spots laterally concave together looking (as 

 Boyle stated) like "a fat "X" enclosed in single quotation 

 marks", and the apical elytral spot greatly reduced or 

 absent . 



References . Boyle 1956:133,135-136, 153-154; Hoebeke 



1978:11; Ruette 1970:53; Skelley et al. 1991:65. 



Ischyrus scriptus (Olivier) 



Erotylus scriptus Olivier 1807:484-485, t.3 f.38. 



Mycotretus scriptus (Olivier), Dejean 1836:429, 



1837:453. 

 Ischyrus scriptus (Olivier), Lacordaire 1842:119- 

 120. 

 Erotylus affinis Duponchel 1825:47, t.l f.26, 

 Lacordaire 1842:119-120. 



Mycotretus affinis (Duponchel), Dejean 1836:429, 

 1837:453. 

 Dacne femoralis Chevrolat 1841:63-64, new synonymy. 

 Ischyrus femoralis (Chevrolat), Lacordaire 

 1842:114-115. 

 Ischyrus velatus Lacordaire 1842:115-116, new synonymy. 

 Ischyrus maculiventris Lacordaire 1842:120-121, Crotch 

 1876: (55) 431. 



