no. 3601 TRIPLAX AND HAEMATOCHITON — JOHNSON 19 



Type: Sex unknown, in Museum National d'Histoire Naturelle, 

 Paris, labeled l 'cruentipennis Lacordaire, Type, 'BrasilV 



Type-locality: "Brasil." 



Distribution: The only specimen known to the author is that of 

 the unique type labeled "Brasil." 



Haematochiton elateroides Gorham 



Haemaiochiton elateroides Gorham, 18S8, p. 81, pi. 5 (fig. 4.) 

 Haematochiton bisculptum Casey, 1916, p. 168. 



Diagnostic description: Coloration of head and pronotum black, 

 elytra blood red except at extreme apices. Overall shape is elongate- 

 elliptical; two ends of the body are about equally parabolically 

 rounded, length to width ratio about 2.2 to 1. Maxillary palpi 

 terminal segments moderately widened without distinct brush. Pro- 

 notum subtrapezoidaj, moderately convergent anteriorly, median 

 length about one-eighth shorter than the apical width, the four 

 pronotal angles are in view when viewed from directly above. Pro- 

 notal punctures relatively small and shallow medially, suddenly much 

 larger and distinctly flat bottomed on lateral thirds. Elytra blood 

 red except at apices, relatively nitidous. Cephalic punctures rela- 

 tively large and flat bottomed along base, becoming smaller and 

 denser apically. Abdominal pubescence and punctuation weak. Ab- 

 dominal and metasternal coxal lines absent; if occasionally present, 

 they are short basal traces. Specimens of H. elateroides Gorham from 

 the Chiricahua Mountains were compared with the unique type of 

 H. cruentipennis (Lacordaire) . The most obvious differences between 

 the two species are shown by the following characteristics of the 

 former: elytral intervals impunctulate, not punctured; metasternal 

 coxal lines short to absent, not long and prominent; prosternal coxal 

 lines short, not long and connecting medioapically on the presternum; 

 abdominal punctuation weak, not moderate; abdominal pubescence 

 extremely faint, not moderate; body length to width ratio 1.9 to 1, 

 not 2 to 1. 



Male genitalia: The median lobe (see Boyle, 1956, fig. 135) is 

 narrowly membranous along the broad opening of the median orifice. 

 The aedeagus is quite similar to that of Mycotretus nigromanicatus 

 Boyle in gross characteristics. The distinctive anterior end of the 

 internal sac is illustrated in Boyle (1956, fig. 136). 



Published illustrations: The adult is figured in color by Gorham 

 (1887-1899, pi. 5: fig. 4). 



Type: Not seen. 



Type-locality: "Ciuded in Durango, 8100 feet, Mexico." 



Distribution: This species has been collected in the southwestern 

 United States and in Mexico. The following: localities have been 



