482 PROCEEDINGS OF THE NATIONAL MUSEUM vol. m 



Maemactes perforatus Champion 



Figure \,a-d 



Maemactes perforatus Champion, Biologia Centrali-Americana, Coleoptera, vol. 



4, pt. 4, p. 529, 1905. 

 Maemactes subfasciatus Champion, Biologia Centrali-Americana, Coleoptera, vol. 



4, pt. 4, p. 530, pi. 26, figs. 12, 12a, 1905. New synonymy. 



Thanks to the kindness of Mr. J, Balfour-Browne, of the British 

 Museum (Natural History), I have seen one abraded specimen of 

 perforatus and two of subfasciatus, all determined by Champion. On 

 the basis of external structure there is little question regarding the 

 above synonymy. Apparently Champion separated the two forms 

 because perforatus has eyes which are close together while subfasciatus 

 has eyes more widely separated. The frons of perforatus is 0.18 mm, 

 wide, the frons of a male subfasciatus is 0.18 mm. wide, and the frons 

 of a female subfasciatus is 0.36 mm. wide; thus sexual dimorphism 

 probably accounts for the observed difference. On the basis of the 

 male genitalia the synonymy is not so certam. As illustrated by 

 figure 1, a-d there is a sliglit difference in the shape of the median lobe 

 of the aedeagi of the two forms. That of subfasciatus (fig. 1, c, d) 

 is comparatively shorter and blunter than the median lobe of the 

 aedeagus of perforatus (fig. 1, a, b). The exact significance of this 

 difference is not known at present and can be determined only when 

 a series of dissections is available for study. The forms are sympatric, 

 both having been found at Calderas and at Duenas, Guatemala. 

 Length, 4.7 to 6.5 mm.; width, 2.2 to 2.7 mm. 



Distribution: Guatemala: Calderas, Duenas, Quich6 Mountains, 

 and Zapote. 



Maemactes cribratus (LeConte), new combination 



Baropsis cribratus LeConte, Proe. Amer. Philos. Soc, vol. 25, p. 259, 1876. 



This species was originally described from "Kansas and Texas." 

 I have seen material from Victoria, Tex., labeled "March 1913, under 

 cowchips, J. D. Mitchell" and also material labeled "South West 

 Texas" and "Mexico, tomato fruit, 12-4-52," the latter taken in 

 quarantine at the United States border at an unspecified station. 

 The median lobe of the aedeagus of the male is similar to that figured 

 for M. perforatus (fig. 1, a, b) with the exception that it is not quite 

 as stout in lateral view. Length, 3.7 to 4.5 mm.; width, 1.6 to 2.1 mm. 



Maemactes punctatus, new species 



Figure 1, i, j 



Length, 4.75 to 5.06 mm.; width, 2.18 to 2.43 mm. Rather broadly 

 oblong-ovate; slightly depressed dorsally. Shining black; tarsi and 



