June, '11] DAVIS : Illinois APiiiDiDiE 329 



M. granaria Buck.: Pergande, Bull. Div. Ent., U. S. Dept. Agr. 

 No. 44 (1904), p. 14, figs. The most common and generally distrib- 

 uted grain louse in Illinois, but seldom injurious. First reported by 

 Pergande. 



M. laducce Schr.: Thomas, 8th Rep. State Ent. 111. (1880), p. 

 60. What is doubtfully referred to this species is common on culti- 

 vated lettuce in greenhouses, where it often is a nuisance of consid- 

 erable importance. We have also taken it on celery out-of-doors. 



Winged viviparous female. — -Head (PI. 10, fig. 7) and thoracic shield jet black. 

 Abdomen pale green with blackish markings as shown in figure (PI. 10, fig. 8). 

 These markings vary considerably in size, but the figure is typical. Eyes dark red 

 to blackish. Antennae black; more than a third longer than the body; segment VI 

 filament longest, it being more than twice the length of III, IV and V subequal and 

 each about two thirds tlie length of III, VI base about one fourth length of IV or 

 one twelfth of the filament; segment III with 40 to 50 irregularly placed circular 

 sensoria; segment IV with 7 to 11 in a row; V with the usual one at distal end, and 

 VI base with the usual distal one surrounded by several smaller ones (PI. 10, fig. 9). 

 (In two examples, both from same individual, segment III had but 27 and 28 sen- 

 soria, and IV but 2 and 3, respectively.) Beak reacliing coxae of second pair of legs, 

 the tip black. Wings with brownish venation (PL 10, fig. 10). Cornicles black, 

 reaching to or slightly beyond tip of abdomen. Style dusky or brownish to blackish, 

 about half the length of cornicles. 



Pupa. — Entirely pale green. Eyes black. Antennae with segments I, II, and 

 basal portion of III concolorous with body, remaining segments darkening to brown, 

 the last segment black. Legs with femur pale greenish, tibia pale brownish, and 

 tarsus black. Cornicles dusky. Style green. 



Wingless iriviparous female. — Head and body green, varying from pale to dark. 

 Antennae a little longer than body; segment VI filament longest, it being from a 

 third to a half longer than III, IV and V subequal, IV, however, invariably shghtly 

 the longer, VI base short, it being only about one ninth or one tenth the length of 

 filament; segment III with 24 to 30 irregularly placed circular sensoria which are 

 much more thickly placed on the basal two thircls of the segment; pale green with 

 the joints, distal end of V, and VI blackish. (PI. 10, fig. 11.) Cornicles cylindrical, 

 concolorous with body, the tip being blackish, reaching to tip of body, twice the 

 length of style and about four fifths the length of antennal segment III. Style 

 concolorous with abdomen. 



M. liriodendri Monl. and var. rufa Monl. : Davis, Annals, Ent. 

 Soc. Amer. Vol. II (1909), p. 36, figs. I have found this species 

 at Urbana, Galesburg and other central Illinois cities, where it is 

 common on the Liriodendron tulipifera. First reported by the writer. 



W. minor Forbes: 13th Rep. State Ent. 111. (1884), p. 101. First 

 reported by Forbes. 



M. roscB Linn: Thomas, 8th Rep. State Ent. 111. (1880), p. 50; 

 Oestlund, Bull. Geol. and Nat. Hist. Surv. Minn. No. 4 (1887), p. 81. 

 A common and annoying pest of garden roses. First (doubtfully) 

 reported by Thomas. 



^M. ruhi Kalt.: Thomas, 8th Rep. State Ent. 111. (1880), p. 64. 

 Supposedly Thomas's observations were made in lUinois, although 

 he does not so state. The species has not since been reported, and is 

 questionable if it occurs in the United States. 



M. rudbeckice Fitch: Thomas, 8th Rep. State Ent. 111. (1880), 



