190 OETHOPTEEA. 



That which has been said concerning H. guatemalas and II. venezuelce might also be 

 remarked concerning the present insect. Although the hind process of the lateral 

 lobes of the pronotum is but poorly or not at all developed in the present form, it 

 gradually becomes less apparent as we pass from //. sumichrasti to II. costaricensis. 



5. Heliastus benjamini, Caudeil. 



Heliastus benjamini, Caud. Proc. U.S. Nat. Mus. xxviii. p. 474, fig. 6 (1905) l . 



Hab. North America, Nogales and Huachuca Mts., Arizona {coll. U.S. Nat. Mus. 1 ). 



This form may be but a variety of H. aztecus, which is distributed over Northern 

 Mexico, and, like H. sumichrasti, is rather variable in size and colouring. 



6. Heliastus aztecus, Sauss. 



Heliastus aztecus, Sauss. Prodr. (Edip. p. 214 (1884) 1 ; Rehn, Trans. Amer. Ent. Soc. xxix. p. 11 

 (1902) 2 ; Proc. Acad. Nat. Sci. Philad. 1904, p. 528 3 . 



Hab. Northern Mexico l , Durango or Sinaloa {Forrer), Monterey, Nuevo Leon 2 , 

 Victoria, Tamaulipas 3 . 



The mottling of the tegmina is very similar to that of several species of Trimerotropis, 

 especially T. vinculata and its allies. 



7. Heliastus aridus, Bruner. (Tab. II. fig. 10, 2 .) 



Thrincus aridus, Bruner, Proc. U.S. Nat. Mus. xii. p. 78, t. 1. figg. 2, 3 (1890) \ 

 Heliastus aridus, Scudd. Canad. Ent. xxix. p. 75 (1897) 2 ; Psyche, ix. p. 46 (1900) 3 . 



Hab. North America, Texas to California 1 ~ 3 . — Mexico, Tepic {coll. Calif. Acad. Sci.). 



8. Heliastus californicus, Thomas. 



Thrincus californicus, Thorn. Bull. U.S. Geol. Surv. Terr. no. 2, ser. 1, p. 66 (1874) * ; Glover, 

 Illustr. N. Am. Ent., Orthopt. t. 17. figg. 6, 7 (1874) 2 ; Bruner, Proc. U.S. Nat. Mus. xii. 

 p. 187 (1890) 3 . 



Heliastus californicus, Scudd. Canad. Ent. xxix. p. 75 (1897) 4 ; Psyche, ix. p. 46 (1900) 5 . 



Hab. North America, various Californian localities 1_5 , St. George, Utah 5 ; Lower 

 California, Cape San Lucas 5 . — Mexico, Saltillo, Sonora 5 . 



The collections before me do not contain specimens of this insect. It is intermediate 

 in size between H. aridus and H. minimus. 



[9. Heliastus minimus, Scudd. 



Heliastus minimus, Scudd. Psyche, ix. p. 46 (1900) \ 



Hab. North America, Palm Springs, California {A. P. Morse 1 ). 



Scudder says of this insect: "The species is peculiar for its small size, short 

 antennse, slender hind femora, &c." It very likely occurs in Mexico as well.] 



