248 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 6 



cane fields, but the only two that were found were parasitized; D. 

 saccharalis by Trichogramma pretiosa Riley (det. Howard) and D. 

 grandiosella by a Telenomus sp. (det. Crawford). 



Dr. Dyar has been good enough to draw up the following descrip- 

 tion of the larva of Diatrcea grandiosella Dj^ar: — 



Head rounded quadrate, narrowing a little below; clypeus high; para-clypeal 

 pieces reaching about two-thirds the height of the front; pale orange-brown; a little 

 darker on the vertex, median and para-clypeal sutures whitish; clypeal sutures 

 dark, mouth black, the cobr covering the epistoma and bases of maxilla; ocelli with 

 black central dots, a patch of black covering the lower ocelli; labium and palpi pale; 

 a black triangular spot at side of occiput near the middle; setae rather coarse, pale, 

 without visible tubercles. Body cylindrical, elongate, moderately robust, tapering 

 posteriorly but only slightly so anteriorly. Thoracic feet moderate, pale brownish, 

 like the head with smoky patches before and behind; abdominal feet very short, 

 thick, the crochets in circles, anal feet somewhat longer, their circle of crochets 

 broadly broken behind. Color whitish with a broad purplis^i shaded subdorsal 

 stripe, which is quite faint and blotched in the fully grown larva^. Tubercles large 

 and conspicuous, blackish brown, I larger than II, IV and V forming a single tubercle, 

 VII an elongate patch; on the thorax a narrow chitinous band on the posterior edges 

 of joints 3 and 4 dorsally; tubercles la and lb, Ila and lib, III and IV, VI ^-ith two 

 setse. Cervical shield large, containing six seta) on each side, pale brown like the 

 head with a pale dividing dorsal line; a small black stain on the lateral margin, 

 otherwise unmarked. Joint 13 rather distinctly divided, its anterior part with the 

 subdorsal tubercle 5 joined over the back by a black stain; anal plate pale reddish 

 brown with three setaj on each side, irregularly joined by brown stains, the plate 

 appearing bimaculate." 



Canes damaged by the Gophef {Heterogeonnjs hispidus Le Conte) 

 called ''Tuza" in Mexico often contained larvae of Metamasius seri- 

 ceus Latr. var. carhonarius Chev. (det. Schwarz) but in no case was 

 this beetle observed attacking perfectly healthy canes. When the 

 canes were fermenting, from damage done by Gophers or Diatroea 

 sometimes they were attacked by Xyleborus affinis Eichf. (det. Lt.- 

 Col. Winn Sampson) but this Scolytid was never observed in sound 

 stalks. A Tingid, Leptodidya fabida Champ., which Mr. Heidemann 

 has been good enough to describe and figure was not very numerous, 

 and although it damaged the cane leaves in the characteristic way of 

 this family, it cannot be considered a pest at all. The grassy spaces 

 between the fields of canes harbored a great many grasshoppers of 

 different species, some did trivial damage to the cane leaves, but 

 were never numerous enough to make their presence felt. The fol- 

 lowing genera were represented: Machoerocera, Tceniopoda, Schistocerca 

 and Neoconocephalus. No doubt these grasshoppers are kept in con- 

 trol by natural enemies, among which there were many insectivorous 

 birds. 



The sugar cane leaf serves as food for many caterpillars but at the 



