70 PROCEEDINGS OF THE NATIONAL MUSEUM vol. io» 



the lateral margin distinct, epipleurae very narrow, not extending to the tip. 

 Anterior coxae conical, contiguous; legs slender, tibiae not sulcate externally, 

 middle tibiae of the male incised at the extremity on the inner margin; ungues 

 with a large angular basal dilation. Abdomen with five ventral segments nearly 

 equal in length and alike in both sexes. 



I have adopted the generic name proposed in Dejean's Catalogue for Gall, 

 dorsalis Oliv. 



Type of genus: Phyllecthrus dorsalis (Olivier). 



Key to species of Phyllecthrus 



1. Large, from 5 to 6.5 mm. in length dorsalis (Olivier) 



Small, from 3 to 4 mm. in length 2 



2. Prothorax with wide dark lateral markings gentilis LeConte 



Prothorax entirely pale or with at most faint brown lateral spotting. 



Texas texanus LeConte 



Phyllecthrus dorsalis (Olivier) 



Figure 1,/ 



Galleruca dorsalis Olivier, Entomologie, vol. 6, p. 646, 1808. 



Phyllecihris dorsalis Dejean, Catalogue des Col6optferes, ed. 3, p. 406, 1837. 



Galleruca atrivenlris Say, partim, Journ. Acad. Nat. Sci. Philadelphia, vol. 3, 



pt. 2, p. 461, 1824. 

 Phyllecthrus dorsalis LeConte, Proc. Acad. Nat. Sci. Philadelphia, p. 207, 1865. 



Between 5 and 6.5 mm. in length, elongate oblong oval, alutaceous 

 but moderatelj^ shiny, finelj^ punctate; head, prosternum, breast and 

 femora yellomsh brown, the last with a dark streak; prothorax with 

 wide dark piceous lateral markings, the lateral margin and middle of 

 disk yellow-brown ; in some Kansas, Nebraska, and Missouri specimens 

 the pronotum entirely pale; scutellum pale, elytra, tibiae and tarsi 

 piceous. In male the antennae 10-jointed and middle tibiae notched. 



Head with interocular space half width of head, smoothly rounded 

 over occiput, finely and sparsely punctate, frontal tubercles well 

 marked, a short bulging carina between antennal sockets, lower front 

 moderately long, with scattered punctures. Antennae in male 10- 

 jointed, 2d joint alone short, rest long, black and hairy and extending 

 well below middle of elytra, the terminal joint often reddish brown. 

 Antennae in female 11-jointed, 2d and 3d joints short, with the 3d a 

 little longer, but together not so long as 4th, remainder a httler shorter 

 than 4th and slender, not so long or wide as in male and deep brown, 

 not black. Prothorax wider than long with only slightly curved sides 

 and a shallow depression in lower half, in some specimens faint; shiny, 

 impunctate; dark piceous with pale lateral margin and a pale median 

 area varying in size and shape from a central roundish spot to an elon- 

 gate pale line; in some Nebraska, Kansas, and Missouri specimens 

 the pronotum entirely pale. Scutellum pale. Elytra widened toward 

 apex with well-marked humeri and short intrahumeral sulcus, dis- 



