157 



Mounted in balsam on two slides. In poor condition. Now placed in the 



genus Macrosiphum, Passerini. 

 Tychea brevicornis Hart 



Eighteenth Rep. State Ent. 111., March 4, 1895, p. 97. (Reprint, 1920, p. 86). 

 Cotypes. — Wingless viviparous 9 : Normal, Illinois, on corn roots, July 



28, 1884 (S. A. Forbes); Champaign, Illinois, in ants' nest in pasture, 



October 25, 1886 (C. M. Weed). Ace. Nos. 4583 and 10947. Slide No. 



3171. 

 One balsam slide mount and several specimens in alcohol in two vials. Now 



placed in the genus Pemphigus Hartlg. In very poor condition. 

 Tychea erigeronensis Thomas 



Eighth Rep. State Ent. 111., 1879, p. 168. 



Cotypes ? — Immature: Champaign, Illinois, on "roots of Endive and 



Erigrron canadcnse" (T. J. Burrill). Slide No. 2769. 

 In poor condition. Mounted in balsam. Now placed in the genus Trama 



Heyden. Stated by Davis (1913) as "probably types". 



Family Alevrodidae 



Aleurodes aceris Forbes 



Fourteenth Rep. State Ent. 111., September 2, 1885, p. 110. 



Cotypes. — 9: Tamaroa, Illinois, April 10, 1884 (S. A. Forbes). Ace. No. 

 1368. 



Remains of three cotypic adults in very poor condition preserved in alcohol. 

 Because of the condition of these specimens no lectotype has been se- 

 lected. Now known as Aleurochiton foriesii (Ashmead). The specific 

 name of forbesii was proposed for this species by Ashmead because aceris 

 was preoccupied. 



Family Coccid.^e 



Aspidiotus aesculi Johnson 



Bull. 111. State Lab. Nat. Hist., Vol. IV, Art. XIII, October 1896, p. 386. 

 Cotypes. — (J and 9 : Stanford University, California, on Aescuhis Califor- 

 nia. 1892 (W. G. Johnson). Ace. No. 29423. 

 Cotypic material on sections of small branches sealed in five glass tubes. 



Placed by MacGillivray in the genus Diaspidiotus Leonardi. 

 Aspidiotus comstocki Johnson 



Bull. 111. State Lab. Nat. Hist., Vol. IV, Art. XIII, October, 1896, p. 383. 

 Lectotypic slide. — Adult 9 : Mt. Carmel, Illinois, on leaves of Acer sac- 



charinum Wang, August 2, 1895 (Dr. J. Schneck). Ace. No. 21412. 



Slide No. 2201. 

 Paratypic slides. — Immature forms and adult 9 : Mt. Carmel, Illinois, on 



leaves of Acer saccharinum Wang, April-August, 1895 (Dr. J. Schneck). 



Ace. Nos. 21244, 21366, 21412 and 21413. Slides 2200, 2202-2204 and 2199. 

 Also numerous paratypic scales on leaves in six sealed test tubes. In fair 



condition. MacGillivray has placed this species in the genus Aspidiella 



Leonardi. 

 Aspidiotus forbesi Johnson 



Bull. 111. State Lab. Nat. Hist., Vol. IV, Art. XIII, October, 1896, p. 380. 

 Lectotypic slide. — Adult 9 ; Champaign, Illinois, on cherry trees, Septem- 

 ber 25, 1895 (W. G. Johnson). Ace. No. 21547. Slide 2163. 

 Lectoallotypic slide. — Adult S : Champaign, Illinois, on cherry trees, July* 



25, 1895 (W. G. Johnson). Ace. No. 21391. Slide No. 2161. 

 Paratypic slides. — Immature forms and adult 9 : Champaign, Illinois, on 



cherry trees, December, 1894, to April, 1896 (W. G. Johnson). Ace. Nos. 



210.06, 21342, 21360, 21472, 21547 and 29434. Slide Nos. 2160, 2162, 2164, 



2173 and 2174. 



