234 THE UNIVERSITY SCIENCE BULLETIN. 



Genus Eugnathodus Bak. 



The members of this genus are very much like those of Bal- 

 clutha, being long and slender, the elytra long and greatly ex- 

 ceeding the abdomen, with only two anteapical cells, and a 

 distinct appendix. The wings also possess but two apical cells. 

 Here, however, the head is distinctly wider than the pronotum 

 and thus these forms are readily separable from those of the 

 preceding genus. 



One member of the genus occurs in Kansas. 



Eugnathodus abdominalis (Van D.). 



(PI. 16, figs. 5-6.) 

 Gnathodus abdominalis Van. D., Can. Ent., xxiv, p. 113, 1892. 

 Eugnathodus abdominalis Bak., Invert. Pacifica, i, p. 2, 1903. 

 Balclutha abdominalis DeL., Tenn. St. Bd. Ent., Bui. 17, p. 95, 1916. 

 Eugnathodus abdominalis Van D., Cat. Hemip. N. A., p. 697, 1917. 

 Eugnathodus abdominalis Lathr., S. C. Agr. E.xp. Sta., Bui. 199, p. 107, 1919. 



Form: Distinctly elongate, tapering posteriorly. Length, 3 to 3.5 

 mm. Head as wide or slightly wider than the pronotum. Vertex short, 

 slightly longer at middle than next the eye, about three times as wide as 

 long. Pronotum broadly rounded anteriorly, not as much produced as in 

 Balclutha, lateral angles sharp, posterior margin very slightly emargi- 

 nate. Elytra very long, greatly exceeding abdomen, strongly overlapping 

 apically, appendix distinct, only two anteapical cells. Wings with two 

 apical cells. 



Color: Greenish, tinged with whitish on elytra and fuscous on ver- 

 tex, pronotum, and scutellum. Pronotum sometimes with three dark 

 longitudinal lines. 



External genitalia: Female, last ventral segment short, slightly sinu- 

 ate on either side of a very slight median prominence ; pygofers long and 

 narrow, widest at the middle, slightly exceeded by the ovipositor. Male, 

 valve broad, rounded posteriorly; plates broad basally, short, spiny 

 lateral margins convexly narrowing to the divergent apices, which are 

 exceeded by the pygofers. 



Internal male genitalia: Styles with an anterior process, a large 

 rounded lobe to connective, then suddenly narrowed, the terminal process 

 curved outward, rather short and stout; connective Y-shaped, the arms 

 widely separated and curved apically around styles, the stem longer than 

 the arms, widened basally; oedagus enlarged basally, vdth a small dor- 

 sally directed plate, then rapidly narrowed to long terminal process, 

 which curves dorsad and ends rather obtusely. 



