HENRY J. FRANKLIN. 91 



(Volcano Irazu, 6,000-9,000 feet; San Carlos ; San Jose, 3,550 

 feet; Cartago, 4950 feet; La Estrella de Cartago, Zarsero), 

 Colombia (Chiriqui), and Ecuador (one 9 ). Judging from 

 Crawford's records, the species must be confined to the 

 mountains or highlands. He gives no record of finding a 

 single specimen in collections of Hymenoptera, which he ex- 

 amined, from Guacimo (450 feet), Guapiles (1,000 feet), or 

 Pozo Azul (near the Pacific Ocean), yet he speaks of it as 

 the most common species taken and says that he received 

 about one hundred workers from Cartago. Cockerell (Ann. 

 and Magaz. Nat. Hist., Ser. 8, X, 1912, p. 21), after his origi- 

 nal description of zailmatto', makes the following remarks : 

 "The original B. lateralis Sm., was described from the 

 mountains of Guatemala, at a higher altitude than the locali- 

 ties of zvibnattce. I think it is probable that the difference 

 is only racial, the form from the higher altitudes being more 

 melanic." 



This species has its closest ally in B. pulcher. The two 

 species are alike structurally as far as I have been able to 

 discover, except for certain differences in the genitalia of 

 the males, and it is certain that the queens and workers of 

 pulcher vary in coloration very markedly toward the colora- 

 tion of the workers and males of B. ephippiahis. 1 think it 

 quite possible that by sufficient collecting a complete grada- 

 tion in coloration could be worked out between the workers 

 of the two species. Between the queens, however, it would 

 probably be impossible to find such a gradation. It should 

 be noted that the two species have about the same range of 

 habitat and are both apparently highland forms. 



Monteztmice and nigrodorsalis are not at all closely related 

 to ephippiatus, as they both belong to the Dtimoucheli group. 

 I am of the opinion that ivilmaticE also belongs to the Dii- 

 moucheli group, but I have not seen the male of that species. 



Boinl>us (Bom!)u.s) pulcher Cress. 

 ? Boinbus fonnosus Smith, Cat. Hym. Brit. Mus., II, 1854, p. 403, n. 

 77 (excl. patria), 9 . 

 " pulcher Cresson, Proc. Ent. Soc. Phila., II, 1863, p. 108, n. 



42, 9. 



TRANS. AM. ENT. SOC, XXXIX. 



