662 PROCEEDmCS of the national museum vol. 117 



one spot. The coloration of the dark areas of the more northern speci- 

 mens tends to be black (ventrally showing more brownish) with less or 

 little of the bluish purple or greenish iridescence shown by specimens 

 from ^Mexico. The population from the area of Bill Williams Fork, 

 Ariz., which show no pronotal discal spots were not named as a 

 subspecies because of the paucity of specimens. Future collections 

 from the northern areas of Mexico and into Arizona may show that 

 subspecies do exist. 



Male genitalia : The average length of the aedeagus is 1.12 mm. The 

 ventral apical lobe is short, not extending far beyond the dorsal plate. 

 The outline of the ventral apical lobe is straight when viewed laterally 

 and not convex as is L. saponatus (fig. 17). The length of the aedeagi 

 showed no overlap in size with those of L. mexicanus (fig. 16), which are 

 of a similar appearance but smaller. Five specimens were dissected. 



Female genitalia: The spermatheca is similar in appearance to that 

 of L. mexicanus (fig. 11). Specimens of L. guerini have the bulbous 

 basal portion less globular, showing a bulge only on the proximal side. 

 The distal section has a slight bend and lacks the apical hook of L. 

 mexicanus. Two specimens were dissected. 



Biology: The following information was observed on specimen pins: 

 "Maiz, Alamos, Sonora, Dec. 6;" "Hosp. Anis, Cotaxtla, Veracruz, 

 Feb. 10." 



Type: This specimen could not be located by this author and if it still 

 exists is probably in some European museum. Perbosc (1839) gave its 

 measurements as 3 mm. long and 2 mm. wide. 



Type locality: "Enwons de la Vera-Cruz. (Mexico)" (Perbosc, 

 1839). 



Paratype: A female, 3.00 mm. long and 2.00 mm. wide, in the British 

 Museum (Natural History) was examined. "Baly Coll." ''Alonackus 

 guerini Perbosc rev. zool. Mexico 1839 sp. 5." 



Distribution: In the United States this primarily Mexican species 

 is found in Colorado, Arizona, and Texas; populations in the United 

 States are pioneers invading through the "Sonoran tension zone." 

 Further collections may show that the species occurs in southern 

 California, New Mexico, and possibly Nevada, and Utah. 



The material examined included 208 specimens from the following 

 localities : 



GUATEMALA: El Rancho, Guatemala City, Los Ametes. 



MEXICO: Baja California: Cape San Lucas; Comondu, July 2; 

 Purissima, October; San Jose del Cabo. Chiapas: Tuxtla Gutierrez, Sept. 

 25. Colima: Colima, July 2L Guerrero: Acapulco, Aug. 18. Jalisco: 

 La Resolana, Nov. 20. Morelos: Cuautla, May 28, Aug. 21; Cuernavaca, 

 2600 ft. Nayarit: 994.5 km., May 24; Rio de las Canvas, Matamoros, May. 

 San Luis PoTOsf: El Salto, 1700 ft.; Llera, May 21; Tamezunchale; Valles, 

 Jan. 28. Sinaloa: Rosario, Mar. 17. Sonora: Alamos, Dec. 6; Sonoyta, 



