46 The University Science Bulletin. 



tegmina and short sharp tooth on each latero-posterior angle. Scutellum 

 broadly exposed, wide at base, truncate at tip, which does not reach apex of 

 posterior process. 



Tegmina translucent, pubescent, inner margins straight and meeting at 

 median dorsal line; veins prominent and nodulate; apices of tegmina extend- 

 ing beyond tip of abdomen. Legs and undersurface of body light brown 

 mottled with white. Undersurface of abdomen often tomentose. 



Length, 9-10 mm.; with, 3 mm. 



Distribution. Van Duzee records this species from Ontario, New 

 York, New Jersey, Pennsylvania, North Carolina and Ohio. In the 

 Crevecoeur collection is a specimen taken in Pottawatomie county, 

 Kansas, thus establishing its occurrence in the state. 



Hosts. As indicated by the specific name, this species occurs on 

 hickory. Funkhouser reports it on oak also. Matausch gives swamp 

 oak and walnut, and Goding mentions the latter. 



Microcentrus perdita (Amyot & Serville). 



Ledra perdita Amyot & Serville, Heinip., p. 577, pi. 11, fig. 5, 1843. 

 Centruchus leibecki Goding, 111. St. Lab. Nat. Hist., iii, p. 471, 1894. 

 Microcentrus perdita Baker, Can. Ent., xxix, p. 38, 1897. 

 Centruclioides perdita Van Duzee, Bui. Buf. Soc. Nat. Sci., ix, p. 117, 1908. 



Goding describes this species as follows: 



Yellow-ferruginous, silky white between lateral horns; behind horns a spot 

 on costal margin, near base of tegmina. Head black, broad, eyes verj' prom- 

 inent; base convex, griseous, lower part of face strongly declivous; four rough- 

 ened caringe pass along face from base do\vnward, the ocelli being in the two 

 internal ones, the outer ones being contiguous to the ej'es; part of face below 

 eyes triangular, apex yellow. Ocelli equidistant from each other and the eyes. 

 Prothorax convex, lateral angles slightly produced, a prominent median carina 

 extending from base to apex nearly black. Above the lateral angles, on each 

 side, is a long horn or protuberance, flattened laterally, slightly curving upward, 

 outward and forward, the apex truncated; width of base and apex equal. Apex 

 of scutellum bidentate, the teeth ivory-white; posterior margin of prothorax 

 with a very slender tooth or style, extending backward on each side of pos- 

 terior process of prothorax, a little distant from it. The entire surface of the 

 prothorax densely and regularly punctured. Apex of tegmina far surpassing 

 tip of abdomen; a black spot on the internal margin a short distance from the 

 apex; another black spot on the costa, about one-third the distance from the 

 base. Tarsi black; legs mottled with ferruginous and grayish-yellow; tibiae 

 triquetrous. Tegmina lightly ferruginous and opaque. 



Length to apex of tegmina, 8.5: mm.; width at lateral angles, 3.2 mm. 



Distribution. Reported from Massachusetts, New Jersey, Penn- 

 sylvania, Florida, Colorado and New Mexico. Specimens have also 

 been taken in Riley county, Kansas. 



Hosts. Van Duzee reports this specief> from scrub oak. 



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