THE NEGRO BUGS. 63 



24 (28). Galgupha nitiduloides (Wolff), 1802, 98. 



More narrowly oval than atra, feebly but obviously narrowed behind. 

 Black, shining; antennae reddish-brown, darker toward apex; tarsi pale. 

 Head less broad, the apex less obtuse; cheeks densely, rather coarsely 

 punctate. Beak reaching middle coxae. Pronotum and scutellum finely 

 rather evenly and shallowly punctate, more densely, somewhat aciculately 

 so on sides. Corium narrower and more acutely pointed than in atra, its 

 outer margin bordered internally by a distinct ridge. Abdomen finely 

 punctate throughout, much more densely so on sides; propleura smooth; 

 osteolar area with the usual opaque rugose surface. Genital plate of 

 male more than three times as wide as long, its hind margin subtruncate. 

 Length, 4 — 4.5 mm. ; width, 2.7 — 3.5 mm. 



Lake, Marion, Vigo, Knox and Perry counties, Ind., Feb. 

 28 — July 4 ; probably occurs throughout the State, but appar- 

 ently less common than atra. Agricultural College, Miss. 

 (Weed). Occurs on vegetation, especially that of hazel and 

 milkweed, along the edges of woodland and cultivated fields. 

 Hibernates as imago. Ranges from Ontario and New England 

 west to Colorado and south to North Carolina, Texas and 

 Guatemala. Not as yet recognized from Florida. Van Duzee 

 (1894, 169) reported it as rare about Buffalo, N. Y., and 

 (1904, 5) as "abundant on Plantago purshii R. & S. at Ft. Collins, 

 Colo. These were resting on the flower spikes in all stages of 

 development, and perhaps one-half of them were covered with 

 a dusky 'bloom' which gave them a dull bluish-black appear- 

 ance. This is likely connected with the breeding season as is 

 the 'bloom' often found on certain species of Euschistus." The 

 Thyreocoris histeroides Say (I, 311) is a synonym of this species. 

 Zimmer (1911, 245) distinguishes nitiduloides from atra 

 mainly by the former having: 



"A deeply impressed line arising between the subcostal and cubital 

 nervures at their base and running parallel to the former, leaving a 

 distinct ridge parallel to it which extends the greater part of the length 

 of the corium. This shows more plainly when the insect is viewed 

 directly from above. In atra there may be a somewhat raised portion 

 just within the subcostal nervure, but it is not bounded inwardly by a 

 distinct impressed line." In differentiating it from C. nigra he says: 

 "There is also in nitiduloides a finely impressed line just exterior and 

 parallel to the cubital nervure and reaching nearly or quite to the tip 

 of the corium, making the nervure appear double, while in nigra this 

 line is absent, though a broken row of rather coarse punctures may 

 occupy nearly the same position and the suture itself be lost in the 

 punctate groove." 



