362 PROCEEDINGS OF THE NATIONAL MUSEXJM vol. iii 



Proiiotum: Width more than twice length, 2.45(2.21-2.60) : 1.13 

 (0.97-1.17). 



Scutellum: Longer than wide, 1.82(1.52-1.95) : 1.48(1.30-1.60). 

 Length of body: 4.55(4.05-4.80). 



Female. — Similar to male, averaging somewhat larger and stouter. 

 Head: Wider than long, 1.19(1.13-1.30) :0.86(0.80-0.96); ante- 

 ocular length averaging about half (49 percent) anteocular width, 

 0.41 (0.40-0.43) :0. 83(0.76-1. 00). Antennal segments: I, 0.23(0.23- 

 0.26); II, 0.40(0.36-0.44); III, 0.50(0.46-0.60); IV, 0.67(0.60-0.80); 

 V, 0.87(0.83-0.98). Labial segments: I, 0.34(0.33-0.36); II, 0.59 

 (0.54-0.66); III, 0.61(0.60-0.66); IV, 0.43(0.40.0.50). 



Pronotum: Width more than twice length, 2.71 (2.34-3.13): 1.23 

 (1.04-1.36). 

 Scutellum: Longer than wide, 2.14(1.89-2.47):1.72(1.49-2.02). 

 Length of body: 5.23(4.65-5.92). 



Type data. — Location unknown to the author, Palisot de Beau- 

 vois originally gave the type locality as "A Agathon, royaume de 

 Benin" in Africa. Stal (1864), after examining the type, wrote that 

 the African locality v/as in error because this was the common Ameri- 

 can species described by Say as Cydnus ligatus. All authors except 

 Walker (1867) have recognized and accepted Stal's correction. The 

 type locality given in Say's original description was "United States." 

 Specimens studied' — 35 males, 58 females. 



United States: Alabama: Coatopa, Gadsden; May-July. District of Colum- 

 bia: April- June. Florida: Key Largo, INlonticello, Tallulah; January, March, 

 July. Georgia: Peach Co.; May. lozva: Ames, Clarinda, Farragut, Gilbert, 

 Iowa City, Muscatine, Shenandoah; March- August. Illinois: Algonquin, 

 Belvidere, Cairo, Chicago, East Cape Girardeau, Glen Carbon, Havana, Peoria, 

 Urbana; April-September. Kansas: Cowley Co., Douglas Co., Lawrence, 

 Marion Co., Miami Co.; June-October. Kentucky: Henderson Co., Mason Co.; 

 June-September. Louisiana: Baton Rouge; April-June. Maryland: Baltimore. 

 Massachusetts: Boston. Michigan: Ann Arbor, Detroit, Livingston Co., Monroe 

 Co., Oakland Co., Washtenaw Co.; May- August. Mississippi: State College; 

 June-August. Missouri: Aldrich, Barry Co., Glencoe, Hayti, Kansas City, 

 Kinsey, Platte City, St. Louis, Sarcoxie, Wyatt; May- August. Nebraska: Grand 

 Island; July. New Mexico: Ruidoso; June. New York: Geneva, Ithaca, 

 Onandago Co., White Plains; April-June. North Carolina: Black Mts., Raleigh; 

 March- July. Oklahoma: Quinton; June. Ohio: Columbus; April. August. 

 Pennsylvania: Jeanette, Philadelphia. South Carolina: Clemson; August. Ten- 

 nessee: Clarksville, Knoxville, Lawrenceburg; April- August. Texas: Alpine, 

 Austin, Brownsville, Cisco, College Station, Cowley, Crosby, Dallas, Kcrrville, 

 Lonview, Palm Grove, San Antonio, Sanderson, San Jacinto; February- July. 

 Virginia: Arlington, Charlottesville, Fairfax, Falls Church, Nelson Co., Shenan- 

 doah; April- August. Wisconsin: Broadhead; June. 



Mexico: Distrito Federal: Chapultepec, Ciudad de M6xico; July. Guerrero: 

 Rfo Balsas. Jalisco: Puente Grande; July. Michoacdn: Zitacuaro; July. 

 San Luis Potosl: Tamazunchale; June. Other Mexican localities: Tomds, San 

 Jos6; April. Real de Arriba Temescaltepec; July. 



