256 THE CANADIAN ENTOMOLOGIST 



of the Middle- Western States"^ records it from Mich., Ohio, Ky., Ind., 111., 

 Wis., Minn., Iowa, Mo., Kan., Neb., N. Dak. Heald^ describes a disease of 

 the Cottonwood due to Fomes applanatus, but Von Schrenk and Spaulding^ 

 consider it as a saprophytic form. 



Full-grown larva. — ^Length 2.5 mm. to 3 mm. Width 1 mm. Colour 

 whitish or dirty white; body soft, curved, resembling a miniature white-grub, 

 strongly convex above and flattened beneath, skin transversely wrinkled. 

 Head whitish, mouth-parts dark. Body and head sparsely hairy. Median 

 dorsal surface of thoracic segments elevated into a distinct ridge. This ridge 

 not as pronounced in immature larvae. Dorsal portion of abdominal segments 

 supplied with transverse group of minute stiff hairs or spines. Fewer similar 

 spines on dorsal surfaces of thoracic segments. Legs short and weak. 



Pupa. — -Length 2.2 mm. Width L4 mm. Suboval, white or yellowish 

 white, smooth. Posterior end prolonged into a somewhat flattened blunt 

 process armed at each posterior, lateral edge with a transverse leg- like ap- 

 pendage, each appendage terminated by a chitinous hook. 



Adult. — Catorama nigrituliim Lee, (Proc. Phil. Acad. Nat. Sci., 1865, 241). 

 The following description is by Blatchley. "Elongate- oval, moderately robust, 

 less than twice as long as wide, not narrowed behind. Black or piceous; pubes- 

 cence sparse and very fine. Head and thorax finely, closely and evenly punctulate 

 without intermixed coarser punctures. Elytra finely punctulate with 

 scattered larger punctures. Eighth antennal joint broadly triangular. Length 

 1.7-2.4 mm." 



A NEW SPECIES OF PHORID^ FROM ILLINOIS (DIPTERA). 



BY J. R. MALLOCH, URBANA, ILL. 



The species described herein was taken by me in 1918, and the type is 

 deposited in the collection of the Illinois State Natural History Survey. 



Beckerina luteola, sp. n. 



Female. ^ — -Testaceous yellow, shining; third antennal joint orange yellow; 

 frons brownish; dorsum of thorax with 3 faint reddish vittae; pleura with a 

 small, dark spot below base of wing; dorsum of abdomen except the anterior 

 and posterior margins of each segment brown; apices of hind femora infuscated; 

 wings clear, veins pale brown; halteres yellow. 



Frons about 1.5 as broad as long, the surface with sparse, erect setulae in 

 addition to the strong bristles; preocellar series of bristles almost straight, 

 second series following contour of anterior margin of frons, slightly curved; 

 postantennals two in number, divergent, erect, moderately strong; third antennal 

 joint rounded, about one- fourth as large as eye; arista longer than width of 

 frons, pubescent; palpus larger than third antennal joint, with a few bristles 

 along lower margin; proboscis short, stout, fleshy. Dorsum of thorax with 

 dense, short, pale hairs; scutellum much broader than long, with two bristles; 

 mesopleura bare. Abdomen with a few weak bristles on lateral margins of 

 second and third do rsal segments. Legs stout; fore tarsi slender; all tibiae 



6. Wash. Univ. Studies, Vol. Ill, Part 1, No. 1. 



7. Nebr. Agr. Sta. Kept. 19; p. 92-100, 1906. 



8. U. S. Bur. Plant Industry, Bui. 149, p. 58. 

 November, 1919 



