FIREFLY GENUS PYRACTONEMA — McDERMOTT 147 



Atypical form : The 20 shorter specimens differ mainly in dimen- 

 sions from the typical form, and naming them even as a variety does 

 not seem justified. 



General: Resembling the typical form, but shorter and propor- 

 tionately broader, outline elliptical, with relatively wide explanate 

 elytral margins. 



Dimensions: Males 10.0 to 12.9 mm. long by 4.1 to 4.6 mm. broad; 

 average 11.6 by 4.4 mm. Females 12.0 to 14.8 mm. long by 3.0 to 

 5.9 mm. broad; average 13.5 mm. by 5.3 mm. 



Pronotum as in the typical form. Average length 0.67 of width in 

 male, 0.69 in female. 



Elytra 0.7 of body length in males, 0.77 in females. 



Antennae tend to be relatively shorter than in the typical form, 

 about 0.44 of body length. 



Two of the males had no black on the pronotum, and another had 

 only a brown spot in the apical fourth and a streak along the basal 

 margin. One had a very narrow black border and an incomplete 

 median vitta. In one specimen, the scutellum and mcsonotal plates 

 were pinkish brown. In all specimens, the latter were unusually 

 wide. Two females had incomplete median vittae, and in one of 

 these the black borders were also incomplete, and were very narrow in 

 two specimens. In one male, the pygidium was largely black instead 

 of the usual pink with black lateral and apical borders. 



Elytral explanate margins conspicuously wider than in the typical 

 form, usually widest at basal fourth. 



The shorter body and elliptical outline suggest that this variant 

 may have been the basis for the original description of the species. 



P. haemorrhoa is apparently a clearly distinct species, and it is odd 

 that Solier failed to mention the characteristic red terminal abdominal 

 segments in any of his descriptions. About 180 specimens were among 

 the material received from Pefia, all of which were longer than Fair- 

 maire's length of 10 mm., and 20 of which were of a smaller and 

 proportionately broader form. The collection of the California 

 Academy of Sciences contained specimens intermediate between these 

 two forms. 



Pyractonema latior, new species 



Figure 6 



Material: 29 males and 1 1 females, including two pairs in copulation. 



Type locality: Widely distributed, but Estero de Leiva, Parral, 

 Chile, may be given. 



Holotype and 4 paratypes, USNM 62821. 



General: A small, rather broad, nonluminous lampyrid with a pink 

 pronotal disc, usually partially divided by a narrow infuscatc longi- 



