440 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ni 



V, 0.38(0.34-0.40). Labial segments: I, 0.24(0.23-0.26); II, 0.44 

 (0.42-0.46); III, 0.33(0.31-0.35); IV, 0.23(0.21-0.26). 



Pronotum: Length-width ratio, 0.88(0.85-0.91): 1.04(1.63-1.67). 



Scutelhim: Length-width ratio, 1.19(1.15-1.23) : 0.95(0.97-1.00). 



Length of body: 3.46(3.43-3.50). 



Type data. — Walker's type (BrM) was listed for the general terri- 

 tory of "North America"; Uhler's type (USNM) of elongatus came 

 from "California." 



Specimens studied. — 112 males, 146 females. 



United States: Arizona: Aquila, Baboquivari Canyon (Pima Co.), Castle 

 Hot Springs, Chiricahua Mts., Douglas, Florence, Gila Bend, Globe, Grand 

 Canyon (Desert View), Indian Hot Spring, Nogales, Patagonia, Phoenix, Roose- 

 velt Dam, Sabino Canyon (Santa Catalina Mts.), Thatcher, Tucson, Yuma, 

 Warren; April to August. California: Borego Valley, Campo, Clayton, Coachella, 

 Colton, Death Valley, Edison, Imperial Co., Lindsay, Los Angeles, Mt. Diablo, 

 Needles, Niles Canyon (Alameda Co.), Oakland, Ojai, Orange, Palm Springs, 

 Paso Robles, Ripley, San Bernardino, San Diego, San Felipe Valley (San Diego 

 Co.), San Francisco, San Quentin, Santa Anna River, Santa Cruz, Sobabo Springs, 

 Tanbark Flats (Los Angeles Co.) ; March to November. Nevada: Hoover Dam, 

 Carson City, Las Vegas; June to August. New Mexico: Clovis; August. Texas: 

 Concho, Dell City; July, August. Utah: Delta, Oasis; July, August. 



Mexico: Sonora: Hermosillo, Imuris, Pitiquito, San Bernardino; June, July. 

 Baja California: Mesquital, San Fernando, San Ignacio; July. 



Ecuador: Galdpagos Islands: Bindloe Island. 



DiscussiON.^ — The ecological notes on the specimens tell little about 

 the habits of the species because they represent the usual collecting 

 places for members of the family: i.e., at lights and under objects on 

 the ground. There is one specimen, however, which does bear an 

 interesting label which the author prefers to disbelieve. The specimen 

 is labeled "Sao Paulo, Brazil(!), San. F. 23832, VII-8-4 7-10080." 

 The Brazilian locality would suggest that the specimen was from that 

 country, while the abbreviation "San F." indicates that it was inter- 

 cepted in commerce at that quarantine station. Since San Francisco 

 is within the known range of parvulus and Brazil is very far removed 

 from it, the author prefers to interpret this as a case of contamination 

 after the products to be examined arrived in California. 



The "Aethus suhglahef of Walker has long been an enigma to heter- 

 opterists, but personal examination of the type leaves no doubt that 

 the name is correct for this species. 



In 1883 Signoret transferred Uhler's species and Herrick-Schaeffer's 

 (1839, p. 97) Cydnus elongatus into Geotomus, making Uhler's species 

 a junior homonj^m of Herrick-Schaeffer's species and proposing for it 

 the new name parvulus. 



