SCUTELLEROIDEA OF IOWA 111 
Banasa dimidiata is one of our most beautiful pentatomids 
although subject to some variation in color, size, punctuation 
and convexity of the pronotum. Some variation also obtains in 
the proportionate length of the second and third antennal seg- 
ments. 
In general, this is a common and widely distributed form but 
it appears to be rare in lowa. Osborn recorded it from Ames 
with the note, ‘‘not common.’’ But five Iowa specimens are at 
hand. Four are from Lake Okoboji; two were taken in June, 
one in July and another adult, apparently but recently molted, 
was collected August 22. All were taken in woodland from 
deciduous trees. A single specimen from lowa City was taken 
November 6 from beneath dead elm leaves. 
Banasa calva (Say) 
1831. Pentatoma calva Say, Descr. Het. Hem., 7. 
1851. Rhaphigaster Catinus Dallas, List Hem., I, 282. 
1859. Pentatoma calva Say, Compl. Writ., I, 318. 
1876. Banasa calva Uhler, Bull. U. S. Geol. Geogr. Surv., II, 291. 
1878. Atomosira calva Uhler, Proc. Bost. Soc. Nat. Hist., XIX. 379. 
1904. Banasa calva Van Duzee, Trans. Am. Ent. Soe., XXX, 59. 
Closely allied to the preceding but averaging a little larger and nar- 
rower posteriorly and with the colors a little paler. Body reddish brown, 
punctured and shining. Head distinctly narrowed anteriorly, the second 
segment of antennae proportionately longer than in B. dimidiata. Pune- 
tures on pwonotum and hemelytra a little finer than in that species; 
usually a few calloused impunctate areas on corium. Venter pale, the 
punctures along the sides few and not strongly contrasted; outer apical 
angles of incisures marked with distinct black points. 
This and the preceding species are very similar but the char- 
acters above mentioned in the diagnosis and key will usually 
serve to distinguish them. Osborn listed this form from Iowa 
and reported it as ‘‘not common.’’ Thus far, we have not ob- 
tained specimens within the state. My material is from Wash- 
ington, D. C., Wisconsin and Oregon. In general, this form 
seems to be less common than B. dimidiata. 
Banasa euchlora Stal 
1272. Banasa euchlora Stal, Svensk. Vet. Handl., 10, no. 4, 44, 
1876. Banasa euchlora Uhler, Bull. U. S. Geol. Geogr. Surv., II, no. 5, 291. 
1892. Banasa euchlora Osborn, Proce. Ia. Aead. Sci., I, Pt. If, 121. 
1904. Banase euchlora Van Duzee, Trans. Am. Ent. Soec., XXX. 61. 
6 
Elongate ovate, narrowed behind. General color pate green, shining, 
coarsely punctate, more or less marked with whitish calioused areas. Head 
green, finely but sparse:y purctaie, a whitish tine in front of each eye, ihe 
