96 PROCEEDINGS OF THE NATIONAL MUSEUM vol. los 



knees; middle tibiae of male notched near apex, tibiae with fine spine, 

 claws appendiculate. Length 4.5-5.0 mm.; width 2 mm. 



Type: Not examined by writer, but H. J. Grant of the Philadelphia 

 Academy of Sciences writes as follows: "Type No. 3793. Holotype. 

 Male. Locality: Tex. In the Horn collection there are seven para- 

 types, these being from Texas, Arizona and New Mexico, and four 

 other specimens from Arizona, Kansas and California." 



Other localities: Houston, Tex., on Helianthus; Shreveport, La., 

 F. V. MaUy. 



Remarks: Horn originally mistook this for Phyllecthrus dorsalis 

 (Olivier), and three years later corrected this error, which E. A. 

 Schwartz had pointed out to him, and described it again as new. 



Genus Ectmesopus Blake 



Figure 6,a-k 



Ectmesopus Blake, Proc, Ent. Soc. Washington, vol. 42, p. 95, 1940. 



Small, slender beetles 2-4 mm. long, with long slender legs, usually 

 pale yellow or reddish with lustrous green, blue or violet elytra. 

 Head smoothly rounded, without depressions or protuberances, frontal 

 tubercles not pronounced. Antennae usually not much over half the 

 length of the beetles, in one species nearly the length. Usually some 

 abnormality in the apical antennal joints, 7, 8, 9, 10 or 11 of the male. 

 In one species, the one with the long antennae, this abnormality in 

 the 3d joint. Prothorax from one-fourth to one-third wider than long, 

 with the sides only slightly curved, often nearly straight, narrowly 

 margined and with a smaO seta-bearing pore at the corners, hind 

 margin nearly straight; the disk not at all depressed or deeply punc- 

 tate, but usually smoothly rounded and poUshed. Elytra wider than 

 the prothorax with a small humeral prominence, and usually a little 

 wider in the apical half. Beneath, the epipleura gradually disappear 

 towards the apex. Anterior coxal cavities open. In the male, the 

 front tibiae frequently stout and the middle tibiae with a deep notch 

 on the inside near the apex. Tibiae with a tiny spm*, extremely hard 

 to detect in some specimens. First joint of the hind tarsi equal to 

 or longer than the following. Claws with a small basal tooth. 



Type of genus: Ectmesopus darlingtoni Blake. 



Key to species of Ectmesopus 



1. Prothorax entirely dark without any pale areas, joints 8-10 of male antennae 



deformed. Jamaica tristis Blake 



Prothorax entirely pale or pale with dark markings 2 



2. Prothorax pale with dark markings 3 



Prothorax entirely pale 7 



