BEETLES OF THE GENUS MYOCHROUS — BLAKE 17 



toothed margin and a tooth at apical and basal corners and a moderate 

 depression along basal margin and well-marked median convexity; 

 surface finely, densely, and confluently punctate in longitudinal lines. 

 Elytra a little wider than prothorax with small humeral prominences 

 and a short intrahumeral sulcus ; the rows of punctures not quite so 

 crowded together as in denticollis and more densely covered by scales, 

 the scales being not so fine, in well-marked specimens the brown-and- 

 white scales tending to form short stripes. Body beneath shining, 

 dark brown with a bronzy luster, tip of abdomen usually reddish, the 

 scales on breast and abdomen not so thick and finer ; first abdominal 

 segment coarsely and moderately densely punctate. Hind femora 

 with a blunt tooth, anterior tibiae with the usual imier tooth. Length 

 4.1 to 6 mm. ; width 1.9 to 2.8 mm. 



Type and paratypes. — Type male and 38 paratypes, U.S.N.M. No. 

 59030, collected by R. A. Vickery on corn ; 2 paratypes in Museum of 

 Comparative Zoology. 



Type locality. — Brownsville, Tex. 



Other localities. — Texas: Abilene, Taylor County, Anahuac, Alli- 

 gator Head, Calhoun County, Austin (on Irish potatoes), Los Bor- 

 regos and Fort Brown in Brownsville (on cotton), Buckeye, 

 Matagorda County (on flooded rice), Canutillo (on corn), Carmine, 

 Catarina, Catulla, Columbus, Corpus Christi, Del Rio, Edinburg, El 

 Paso, Fort Davis, Gregory, Hearne (on cotton), Hidalgo (in sugar- 

 cane stalk), Jim Wells County, Kerrville, Kingsville (on wheat), 

 Lnfkin (on cotton). New Braunfels, Raymond ville. Sugar Land, 

 Trinity (on cotton), Utopia (on corn), Victoria (on corn and cotton). 

 Wellborn, Weslaco, Yaleta ; New Mexico : Las Cruces, Mesilla Park, 

 Socorro. 



Remarks. — This species is verj'^ easily confused with denticollis. It 

 differs from it in having not a flattish prothorax but one in which 

 there is a distinct median hump. In general it is a more slender 

 species and has a denser vestiture of thicker scales than denticollis., 

 and the elytral punctures are not so crowded. The aedeagus, while 

 resembling that of denticollis., is larger and longer. It is undoubtedly 

 a Mexican species that does not extend farther than the southern 

 part of Texas. It has been frequently intercepted in shipments of 

 bananas, pineapples, sugarcane stalks, avocados, and tomatoes from 

 Mexico. Usually no definite localities for its occurrence in Mexico 

 can be obtained, but from two, Matamoros, taken on cotton, and 

 Ciudad Mante, Tamaulipas, on tomato, it would appear to be found 

 in the region just south of Brownsville. There is also one specimen 

 in the Bowditch collection, Museum of Comparative Zoology, which 

 Jacoby had ptit under M. melancholiciis and which comes from Paso 

 del Norte, Chihuahua, Mexico, a region south of New Mexico. 



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