Actually, my species suggestion was superficial because i did not reviewed the descriptions of all species due to the lack of material.

Now, i found some materials and felt that the situation was somewhat complicated.

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i) The description of D. fasciatus (= Lygus fasciatus) in Blatchley.

"Oblong-oval. Dull greenish-yellow, rather thickly clothed with semiprostrate fine yellowish hairs; scutellum reddish, the median line and tip usually paler, sometimes green or yellow with only a few red dots on sides (var. viridiusculus Knight); inner half of clavus and inner apical angles of corium reddish-piceous; membrane dusky marbled with paler legs pale yellow, hind femora with apical half reddish, a narrow preapical ring and knees pale, basal fifth of tibiae usually red. Head very broad with eyes large, overlapping front angles of pronotum as in Dichrooscytus. Joints 1 and 2 of antennae greenish-yellow, the latter more than three times as long as 1, its apex blackish, 3 dusky, paler at base, 4 fuscous, one-half as long as 3. Pronotum and scutellum finely transversely strigose, with minute punctures between the strigae. Elytra finely, densely, evenly punctate."

Blatchley says D. fasciatus occurs in eastern NA including TX.

ii) The key for D. olivaeus and D. fasciatus given by Leston

5. Second antennal segment black at the apex; scutellum mostly unicolorous, with some reddening at the margins and apex; pronotum without a transverse dark band; paraclypeus unmarked; male genitalia as Fig. 1 ... Dagbertus olivaeus (Reuter)

5', Second antennal segment unicolorous; scutellum with a conspicuous brown patterning; pronotum with a transverse dark band posteriorly; paraclypeus with a bright red transverse band apically; male genitalia as Fig. 2 ... Dagbertus fasciatus (Reuter)

iii) The description of D. semipicta given by Henry

"Dagbertus semipictus can be separated from fasciatus in the U.S. fauna in having the 2nd antennal segment slightly longer than the basal width of the pronotum ..., the apex of the tylus fuscous (tylus pale on fasciatus), the sides of the thorax and abdoment with a wide, fuscous tripe (fasciatus has, at most, fed flecks), and the base of the pronotum with a wide, transverse, brown to fuscous band."

iv) The description of D. irroratus given by Henry

"The overall pale brown coloration flecked with numerous scattered plaer spots (...) on the dorsum and ventral surface, the pale brwon antennal segments with segment III very short, and the somewhat reddish tibiae with large white spots will distinguish irroratus from all other species now in Dagbertus."

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The above information strongly suggests that this bug is D. fasciatus.

The Blatchley's description of D. fasciatus is almost the same as this bug except for the antenna and the post-prontal fuscous band. But, it includes both D. olivaeus and D. fasciatus, and Leston extracted D. olivaeus having fuscous antennae. Then, the post-prontal fuscous band becomes one of the features that separates two species. Finally, Henry added Bolteria semipictus and Lygocoris irroratus to the genus Dagbertus. The post-prontal fuscous band is shown in D. semipictus as well as in D. fasciatus.

Although other distinguishing features cannot be checked by this photo, your bug must be D. fasciatus in consideration of its distribution.