ART. 23 EEVISION OF THE BEETLE GENUS OEDIONYCHIS BLAKE 35 



only species of the genus that has been known to occur in sufficient 

 numbers to be an injurious insect. In New York and Connecticut 

 it has been reported as a pest on ash, Fraxirms species.^" H. S. 

 Barber has collected it in numbers at Plummer Island, Maryland, 

 on the fringe-tree {Ghionanthus mrginica). 



28. OEDIONYCHIS SUTURALIS (Fabricius) 



Fig. 32 



Galleruca suturalis Fabkicius, Syst. Eleuth., vol. 1, 1801, p. 499. 



Altica suturalis Ouvieb, Ent., vol. 6, 1808, p. 692. 



Oedionychis suturalis Horn, Trans. Amer. Ent. Soc, vol. 16, 1889, p. 193. 



Oblong oval, feebly shining, pale yellow or even waxen with red- 

 dish brown head and sutural vitta extending three-fourths the length 

 of elytra and spreading across base and extending down over humeral 

 prominences, a spot frequently present in middle of each elytron 

 and sometimes at apical three- fourths, these occasionally uniting 

 with sutural vitta to form fasciae. Antennae over half as long as 

 body, slender, yellow, terminal joints somewhat darker, third joint 

 a little shorter than fourth. Head rounded, reddish brown across 

 occiput and front, densely and somewhat coarsely punctate; median 

 groove short and faint, interocular space nearly half as wide as 

 head. Pronotum over twice as wide as long, narrowed a little ante- 

 riorly, with moderately wide, explanate margin somewhat thicker 

 than usual, faintly punctate, yellow, sometimes almost waxen. Scu- 

 tellum reddish brown. Elytra oblong-oval, with rather narrow 

 explanate margin and rather small humeral prominences forming a 

 sulcus within; coarsely and shallowly punctate; a reddish brown 

 sutural vitta varying in width extending to apical three-fourths and 

 broadening at base to spread over whole base of elytra and down 

 over humeral prominences, frequently a spot in middle of either 

 elytron and often one opposite the apical end of vitta, both of these 

 occasionally uniting with sutural vitta to produce fasciae. Body 

 beneath yellow, finely pubescent ; epipleura pale. 



Length. — 3.5 to 4.8 mm. ; width 1.8 to 2.5 mm. 



Type locality. — Carolina. 



Distribution. — New Jersey, North Carolina, " Carolina," Georgia, 

 Florida. 



The fasciate form of the species might be confused with scalaris, 

 but the paler coloring, reddish markings, and coarse punctation of 

 the head easily distinguish it. 



W. S. Blatchley found it in Florida on the flowers of Ilex glabra. 



^'Britton, Conn. Rept., vol. 16, 1917, p. 141. 



