NORTH AMERICAN COLKOPTERA. 65 



Not common, and distinjjuished by tlie almost rounded elytra, and very 

 obese appearance. 



PODAPIOIV Riley. 



This genus contains only a single species, larger and more elongate in 

 form than the species of Apion, at first sight recalling M<i(j(hil!s^ but 

 with the family characters of the Apioninnc ; the figure (Plate III, V'ur. 2) 

 gives the superficial appearance. 



The species is: 



I*, gallicola Riley, Bui. Bkln. Ent. Soe. 6, p. 37.— Black, antennae piceous, 

 clothed with long white pubescence. Head broad, rugose, punctate and very 

 slightly excavate between the eyes, which are large and prominent ; rostrum rather 

 long, slender, equal throughout, very abruptly joining the head : antennae inserted 

 very close to base of rostrum ; basal joint long, slender and rather abruptly clavate. 

 Thorax cylindrie, widest at middle, narrowest at apex, scabrous and very finely 

 and densely punctate; no basal line or punctation; legs with the anterior femora 

 strongly swollen. Elytra elongate, sides even, parallel : striae wide, with an ap- 

 parently double row of irregular, but closely set punctures; intervals narrow. Be- 

 neath scabrous and finely punctate. Length .S — 4.5 mm. 



Hah.— J). C, Mich., Mass. 



This species, Prof. Riley says, is a true gall maker on Plum inops. 

 The gall is spherical or ovoid, rarely elongate, and from one-quarter to 

 three-quarters inch in length, smoother than the unaffected parts of the 

 twig, but concolorous; the interior is hard, woody, usually containing an 

 abundance of licjuid resin. The iniago appears in May or June, and 

 probably oviposits in the one year old twigs ; no twigs appear until the 

 next season, when the larva and pupa of the insect may be found. 



The following species I have not succeeded in positively identifying : 



A. iiodirostre Gerst. Stet. Ent. Zeit., 1854, 261.— Oblong, black, sub-aeneous, 

 slightly pubescent; rostrum dilated near middle, above canaliculate, front tri-sul- 

 cate; antennae short at base, stout. Head grossly punctured ; thorax sub-cylin- 

 dric, narrowed anteriorly, finely punctured : as long as broad, sides equal ; elytra 

 black, aeneous, striate and punctured: interstices sub-convex and shining; humeri 

 prominent, legs piceous. Length 1 — I J lines. 

 JIah.—Vh. 



A. vile Gerst. loc. cit. 249. — Elongate, black, not pubescient, siiining: rostrum 

 elongate, slightly arquate. denselj' punctate at base; antennae inserted close to the 

 eyes, base piceous. Head finely granulate, sulcate between eyes; eyes small, not 

 prominent; thorax nearlj' as wide as long; sides parallel, slightly narrower at 

 apex, base bisinuate : sparsely punctate, foveate at base; elytra elongate, ovate; at 

 base one-half broader than thorax ; sides parallel to terminal third ; striae punc- 

 tate, intervals convex, finely scabrous : legs black, thin : anterior tibia elongated. 

 Length H lines. 



Jfuli. — Baltimore. 



Evidently belongs to the second section, and must be allied to titn'pis. 



TRANS. AMEH. BNT. SOC. XI. (17) JANI'ARV, 1884. 



