440 SUBFAMILY X. CURCULIONIXJE. 



ventral not prolonged backwards at sides, third and fourth short, 

 fifth longer, impressed or foveate in the males. One of the two 

 genera comprising the subtribe is represented in our territory. 



X. CEUTORHYNCHUS Germ., 1824. (Gr., "hidden" -f- "beak.") 



To this genus as characterized above, and having the mesos- 

 ternum oblique, not sulcate; middle coxal cavities closed within; 

 ventral segments 3 5 unequal and third tarsal joint bilobed, 

 Dietz ascribes 47 North American species, several of which are 

 doubtless synonyms. For convenience of treatment our eastern 

 species are separated into three groups. 



KEY TO GROUPS OF EASTERN SPECIES OF CEUTORHYNCHUS. 



a. Hind femora toothed beneath; funicle 7-jointed except in decipiens. 



GROUP A. 

 act. Femora not toothed. 



ft. Funicle 7-jointed. GROUP B. 



l>b. Funicle 6-jointed. GROUP C. 



GROUP A. 



Nine of our eastern species, all of moderate size and having 

 at least the hind femora toothed beneath, belong here. 



KEY TO SPECIES OF GROUP A. 



a. Elytra either steel-blue or greenish-blue with metallic lustre. 

 l>. Claws toothed; thorax broadly constricted near apex. 



680. CYANIPENNIS. 

 bl). Claws simple; thorax strongly constricted near apex. 



681. BOLTERI. 

 aa. Elytra not steel- or greenish-blue in color. 



c. Elytra black with bronzed lustre; claws with a short acute basal 

 tooth. 682. .ERATUS. 



cc. Elytra black or brown, without bronzed lustre. 



d. Larger, 2.7 3.2 mm.; elytra finely sculptured, closely pubescent 

 or scaly; male, except in quadridens, with two elevations on 

 last ventral segment. 

 e. Elytra uniformly pubescent or scaly and without scutellar white 



spot. 



/". More elongate, scales white. 683. RAP^. 



//. Broader, scales brown. 684. SULCICOLLIS. 



ee. Elytra with a scutellar white spot. 



g. Scales white, not uniform, intermixed with coarse hair; last 

 ventral segment of male impressed. 685. QUADRIDENS. 



gg. Scales white in single rows in striae; brownish appressed 

 hairs in several confused rows on intervals. 



686. MAUGIXATUS. 



(Id. Smaller, 2.5 mm.; elytra coarsely sculptured, sparsely pubescent 

 and with a basal white spot on suture, their striae deep and 

 sulciform; male with impression on last ventral. 



