114 Psyche [August 



Male. — Length about .77 mm. Sternum of abdominal segments 3-7 each with 

 a large, pale, transverse area about nine times as wide as long. Segment 9 with 

 two pairs of dorsal spines, of which the basal is much shorter and stouter than the 

 apical. 



Described from many specimens of both sexes, taken on bean 

 plants at Brownsville, Texas, and Matamoras, Mexico, in June 

 and July, by Charles A. Hart. 



Type localiiy. — Brownsville, Texas. 



It is easily distinguished from its ally, H. fasciatus Pergande, by 

 the abdominal sculpture, and, in the male, by the broad, pale areas 

 of the abdominal sterna; in fasciatus these areas are not more than 

 two or three times as wide as long. 



According to Mr. Hart, this species was very injurious in 1908 

 to beans in the region of Brownsville, Texas. Its ravages were so 

 severe that the plants became yellowish and the crop was greatly 

 diminished. Across the Rio Grande in Mexico, near Matamoras, 

 it was found on a species of wild bean w^hich grew along the river 

 bank; and for this reason it would appear that the species is a 

 native one which has lately turned its attention to the cultivated 

 bean. It may become a serious pest to truck gardening in the 



soutli^ 



Zygothrips americanus sp. nov. (Plate 8, Fig. d.) 



Zygothrips minutus. Hood, Bull. 111. State Lab. Nat. Hist., Vol. VHL Art. II, 

 p. 361 (190S). Misidentification. 



Female: forma brachyplera. — Length about 1.1 mm. Color yellowish brown to 

 brownish black, with maroon hypodermal pigmentation which is denser along sides. 

 of pterothorax and abdomen; tibiae, tarsi, and segments 1-3 of antennae usually 

 paler. Surface shining. 



Head about 1.1 times as long as wide, broadest slightly behind eyes, thence nar- 

 rowing very slightly to base; vertex rounded and evenly declivous; dorsal and 

 lateral surfaces almost free from lines of sculpture and with the spines few and very 

 incon.spicuous; postocular bristles capitate, fully as long as eyes. Eyes about one 

 fourth as long as head, not protruding. Anterior ocellus not overhanging; pos- 

 terior ocelli situated in front of middle of eyes. Antennae about twice as long as 

 head, moderately slender, often uniform dark blackish brown, but usually with 

 segments 1-3 (sometimes only 3) paler; segment 3 broadly subconical, with a short 

 pedicel; 4-6 oval, briefly pedicellate, subequal in length; 4 scarcely broader thaa 

 3; 5 slightly the longest of distal segments; 7 oblong, pedicellate, truncate at apex 

 and broadly united to 8, which is subconical and about twice as long as wide; sense 

 cones slender, transparent. Mouth cone blunt, reaching well beyond middle of 

 prosternum; labrum not surpassing labium. 



Prothorax .7 to .8 as long as head and (inclusive of coxae) about twice as wide as. 

 long; surface smooth; sides slightly concave in front of middle; posterior margin 



