NORTH AMERICAN ACROLOPHIDAE — HASBROUCK 555 



cal, weakly sinuate in dorsal and ventral aspects, approximate apical 

 half curving somewhat ventrad in lateral aspect, base very weakly 

 and irregularly expanded ventrad, central portion bearing series of 

 dorsodextral ridges, apical portion gi-adually narrowing and opening 

 irregularly ventrad and distad. 



Vesica membranous, consisting of compactly infolded layers, armed 

 with two large cornuti: cornuti heavily sclerotized and darkened, 

 asymmetrical, directed distad, each with basal half irregularly ex- 

 panded, apices acute; basal cornutus largest, approximately one- 

 third as long as aedeagus; apical cornutus about half as large as basal 

 cornutus, situated at apex of vesica. 



Type. — Type & in the Academy of Natural Sciences of Phila- 

 delphia. 



Type locality. — "Central Alabama." 



Distribution. — Central and eastern United States. Iowa, Kansas, 

 and Texas eastward to Pennsylvania, Vii'ginia, and South Carolina. 



Specimens examined. — 88, from 30 localities (1 9 without data): 



Alabama: Flatwood, cf (June 10, 1917); La Place, near Tuskegee, cf (June 9, 

 1917). Illinois: Champaign, 5 cf cf (June 8-28, 1946, at light, J. L. C. Rapp 

 and W. F. Rapp); "Northern Illinois," d" (June 1906, M. E. Murtfeldt); Palos 

 Park, cf (July 6, 1912, A. Kwiat), cf (July 4, 1940, A. K. Wyatt); Putnam Co., 

 11 d' cf, 2 99 (May 29 to July 10, 1933 to 1943, M. O. Glenn); Urbana, d^ (June 

 15, 1887, at light. Hart), d' (June 12, 1912, at light), 6 d' d', 9 (June 21-26, 1943, 

 at light, F. F. Hasbrouck, P. C. Lurie, F. A. Orr). Indiana: Hessville, rf" (June 

 10, 1911, A. Kwiat) ; Tremont, d" (June 20, 1931, A. K. Wyatt). Iowa: Denison, 

 9 (June 25, 1949); Sioux City, 9 (June 16, 1925, at light, C. N. Ainslie). Kansas: 

 Clark Co., 3 d^ d^ (May and June, elevation 1962 feet, F. H. Snow); Douglas Co., 

 9 (June 10, 1925, mite on abdomen, R. H. Beamer); Lawrence, d^ (May, twilight, 

 E. S. Tucker); Manhattan, d', 4 99 (May 29 to June 2, 1933, gasoline light, 

 H. L. Nonamaker), 9 (June 14, 1939, H. D. O. Miller); Onaga, & (no date, F. F. 

 Crevecoeur). Missouri: Glencoe, d" ("Rockwoods Res.," June 4, 1942, H. I. 

 O'Byrne); Kirkwood, 9 <d'd', 9 (June and July, 1890 to 1912, M. E. Murtfeldt); 

 St. Louis, 9 (July 9, 1904, H. McElhose); Willard, d' (June 9, A. E. Brower). 

 Ohio: Granville, 7 d" d' (July 3-22, 1928 and 1929, A. W. Lindsey). Pennsyl- 

 vania: Finleyville, 4 d^ d', 9 (June 9 to July 1, Engel collection); Pittsburgh, 

 d^ (June 10, Ehrman collection). South Carolina: Anderson, d^ (June 5, 1917). 

 Tennessee: Locality unknown, 2 d^ d^C'Tenn.," Cornell University collection). 

 Texas: Brownsville, rf" (June 5, 1932, five mites on abdomen, J. O. Martin); 

 Burnet Co., d^ (date and collector unknown) ; Uvalde, c? (May 16, 1928); locality 

 unknown, 6 d^ d^ ("Texas," Andreas Bolter collection). Virginia: Dinwiddie, 

 c? (June 1, 1917). 



Remarks. — A. mortipennellus, an old, widely distributed, and locally 

 common species, has a relatively large synonymy with material 

 received on loan from thirteen sources. Among the larger series are 

 those in the collections of the author (11 cf cf, 1 9), Cornell Uni- 

 versity (17 cfcf, 4 99), the American Museum of Natural History 

 (2 cf cT, 5 99), and Mr. Murray O. Glenn of MagnoHa, 111. (11 

 crcf,2 99). 



