POLYPHYLLA. 215 



peculiar to the warmer temperate regions of the northern hemisphere, in the New 

 World reaching as far south as Guatemala, and in Asia, North-western India. 



Four species inhabit our region, and another (P. cavifrons, Lee.) is recorded from 

 the vicinity of our northern boundary in Arizona. 



1. Polyphylla decem-lineata. (Tab. XL fig. 22, s .) 



Melolontha decemlineata, Say, Journ. Ac. Phil. iii. p. 246 (1824) 1 ; Complete Writings, ii. p. 145 ; 

 Lee. Journ. Ac. Phil. ser. 2, iii. p. 229 ; Horn, Trans. Am. Ent. Soc. ix. p. 74 2 . 



Hah. North America, Missouri 1 , westward from Colorado to California 2 . — Mexico, 

 Guanajuato (Salle), Mexico city, Durango city (Edge), San Luis Potosi (Dr. Palmer). 



Mexican examples do not differ from the Californian form, except in their generally 

 larger size. A male example from Guanajuato is figured. 



2. Polyphylla petiti. (Tab. XL fig. 23, <s .) 



Melolontha petitii, Gruer. Icon. Regne Anim., Ins. texte, p. 97 (1830) \ 



Polyphylla leuco gramma, Blanch. Cat. Coll. Ent. i. p. 161 (1850) 2 ; Burm. Handb. der Ent. iv. 2, 

 p. 406. 



Hob. Mexico 12 , Orizaba (Salle), Jalapa, Guadalajara, Mexico city, Durango city 

 (Hoge) ; Guatemala, Purula (Champion). 



We figure a male specimen from Guadalajara. 



3. Polyphylla hammondi. (Tab. XL fig. 24, c? .) 



Polyphylla hammondi, Leconte, Journ. Ac. Phil. ser. 2, iii. p. 228 ; Horn, Trans. Am. Ent. Soc. 



ix. p. 73 \ 

 Polyphylla subvittata, Lee. 1. c. ; Horn, 1. c. (hammondi, var.). 



Hah. North America, Kansas and Northern Texas \ — Mexico, Villa Lerclo in 

 Durango (Hoge). 



Distinguished readily by the tridentate anterior tibiae of the male. 

 A male individual from Villa Lerdo is figured. 



4. Polyphylla conspersa. 



Polyphylla conspersa, Burm. Handb. der Ent. iv. 2, p. 407 \ 

 Hah. Mexico 1 . 



A small and, judging from the description, very distinct species, which I have 

 not seen. 



