The Pcntatojuidae of Nebraska 21 



and in the preceding is very apparent, but, in addition, the two 

 series, in the collection before me, vary also in the shape of the 

 head. In the present species the juga are more explanate and 

 rather concave dorsally, and the tylus is less elevated apically and 

 has the juga more nearly contiguous over its depressed tip. 

 Whether the character will hold in the presence of more material, 

 I cannot positively say. 



Subfamily SCUTELLERINAE 



key to the tribes and genera 



I. Venter with an elongate stridulating spot on the disk, the spot crossing 

 at least the fourth and fifth abdominal segments. 



(Tetyrini) Homaemus 



I. Venter without a stridulating spot (Odontotarsini) . .2 



2. Orifices not distinct Pliimodera 



2. Orifi.ces distinct, prolonged into a groove Eurygaster 



Tribe TETYRINI 



Genus Homaemus Dallas 



key to the species 



I. Sexes much alike; head usually without pale submarginal vittae, without 

 pubescence, with the punctures larger and coarser, and with the 

 iridescent reflections more violaceous; larger (length, 7-9.5 mm). 



aeneifrons 



I. Sexes rather different, the males without broad, longitudinal, median 

 vitta, head with pale submarginal vittae, with whitish, prostrate 

 pubescence, with the punctures finer, and with the iridescent re- 

 flections more greenish ; smaller (length, 6-8 mm) bijugis 



Homaemus aeneifrons (Say). 



1824. Scutellcra aeneifrons Say, Long's Exp., II, p. 299. 



1839. Pachycoris e.vilis Herrich-Schiiffer, ]Vana. Ins., IV, p. 5, fig. 346. 



Rather common in the northwestern portion of the state. A 

 large series of specimens of both sexes is at hand from " Western 

 Nebraska," Glen, Monroe canyon, Warbonnet canyon, Pine ridge, 

 Sioux county, Crawford, Halsey. A single female was taken at 

 West Point in August, 1887, by L. Bruner. 



239 



