ART. 4 BEETLES OF THE GENUS COCCINELLA DOBZHANSKY 25 



transverse spot 3. The subapical fascia may also disintegrate into 

 two small, usually round spots (4 and 5). Equally frequently the 

 intermediate and the subapical fasciae remain intact, but the hum- 

 eral fascia resolves itself into a round humeral spot (1) and a trans- 

 verse scutellar spot (K). Finally, all the fasciae may disintegrate, 

 resulting in a pattern similar to the typical pattern of the genus 

 Coccinella (fig. 30) . Some spots, especially 2, 4, and 1, may be absent. 

 Geographic distribution. — Localities as follows: 



Oregon: Cannon Beach, Tillamook, Colestin. 



California: Modoc County, Mount Shasta, Shively, Slsson, Cayton, Areata, 

 Eureka, Scotia, Fortuna, Orick, Klamath, Hydesville, Mendocino, Guerne- 

 ville, Lagunitas, Fairfax, Albany, Alameda, Piedmont, San Francisco, Los 

 Gatos, Napa County, Plumas County, Tallac, Tahoe, Half Moon. 



Remarks. — The distribution of this subspecies overlaps that of the 

 subspecies Juliana Mulsant. The subspecies eugenii Mulsant is, 

 however, more frequent in the northern part of California than in 

 the San Francisco region. The reverse holds true ior Juliana. 



COCCINELLA TRIFASCIATA Linnaeus subspecies JULIANA Mulsant 



Coccinella Juliana Mulsant, 1856, p. 135. — Casey, 1899, p. 89. 

 Coccinella barda LeConte, 1859, p. 286. 



Coccinella trifasciata Linnaeus var. Juliana Mulsant, Leng, 1903, p. 200. 

 Coccinella perplexa Mulsant var. Juliana Mulsant, Johnson, 1910, p. 57. — 

 Leng, 1920, p. 216. 



More oblong but not less convex than other varieties of C. trifas- 

 ciata. Punctation of the pronotum and of the elytra finer and 

 sparser than in typical trifasciata; elytra shining. Pigmentation of 

 the elytra strongly reduced. Usually only the humeral fascia is 

 present, the two other fasciae being absent completely. The humeral 

 fascia may resolve itself into separate spots (K and 1) . Small blotches 

 of dark pigment may be present on the places occupied in other 

 varieties by the spots 3, 4, and 5. Length of the body, 4.6-5.3 mm. 



The genitalia of the subspecies Juliana are not different from those of 

 the typical trifasciata or from those of the subspecies subversa LeConte. 

 This fact, as well as the absence of marked external differences, 

 indicates that Juliana is a geographical race of trifasciata and not a 

 separate species. The geographic distribution oi Juliana is in accord 

 with this view. 



Geographic distribution. — Localities as follows ; 



California; Areata, Hydesville, Scotia, Fortuna, Orick, Klamath, Dyerville, 

 Shively, Casadero, Felton, Muir Woods, San Anselmo, Point Reyes, 

 Fairfax, Sausalito, Muir Woods, Tiburon, Lagunitas, Mayfield, Napa 

 County, Fieldbrook, Berkeley, Alameda, Piedmont, Contra Costa County, 

 San Francisco, Millbrae, San Mateo, Mountain View, Crystal Lake, San 

 Jose, Palo Alto, Los Gatos, Santa Cruz, Santa Cruz Mountains, Monterey, 

 Carmel, Point Sal (T. Dobzhansky collector), Santa Paula, (P. H. Timber- 

 lake collection). 



