44 PROCEEDINGS OF THE ROYAL SOCIETY OF QUEENSLAND. 
Length 9-5 to 10-5 mm ; humeral breadth 3-5 to 4 mm. 
Described from four male specimens collected by the 
writer on August 7th, 1922, at Ranchito, near Hermosillo, 
Sonora, Mexico, feeding on a cylindropuntia of the Imbricate 
series. Hunter eé al. refers (Bur. Ent. Bull. 113, p. 20) to a 
small form found upon OQ. arbuscula, O. versicolor, and O. 
fulgida at Tuscon, Arizona (U.S.A.). There is little doubt that 
the above-described species is the same referred to by Hunter. 
The type material is in the writer’s collection. 
Chelinidea canyona n. sp. 
Head and pronotum subequal in length ; ocelli nearer to 
extremities of pronotal teeth than to eyes, juga rather abruptly 
pointed and just attaining the tip of the tylus or very slightly 
exceeded by it. Pronotum appearing slightly concave; the 
lateral margins elevated, forming distinct, laterally com- 
pressed crests which are curved upward ; anterior margin with 
a strong acutely pointed tooth on either side. Connexivum 
greatly dilated and inclined upward. Under surface of fore 
femora bearing distally two or three small teeth. Tibize 
triangular with all edges prominently elevated; hind tibize 
with the two outer edges .almost foliaceous. Penultimate 
ventral segment of female medianly cleft to two-thirds of its 
width, the edges of the incision slightly rounded and barely 
overlapping ; margins either side of notch very slightly concave. 
Colour above rusty brown with darker markings. Head 
brown with a paler vitta on tylus extending to base of the head 
and bordered by shining black ; pronotum with a wide border 
of black just before the posterior margin, and very narrow 
ones along the lateral margins; hemelytra with three dark 
bluish vittz each, one along the outer margin and two oblique 
ones converging with the first proximally ; membrane black ; 
connexivum dark with segments indicated by pale lines ; 
beneath yellowish except pectus, bases of legs, and tip of 
rostrum, shining black; legs brownish yellow except coxe 
and bases of femora. 
Length 11 to 14 mm.; humeral breadth 4 to 4-5 mm. 
Holotype, allotype, and paratypes are in the collection of 
the writer. 
The writer first collected this species in the Rio Frio 
canyon, near Rio Frio, Texas (U.S.A.), in June 1921. Subse- 
