156 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. 



ley, which it ap])ears to have reached by way of Tejon Pass. 

 Should its distribution follow that of other plants that have en- 

 tered by the same gateway, it would be unlikely to extend be- 

 3^ond the Sierra Santa Monica and the neighborhood of Los An- 

 geles and Pasadena. Mr. Abrams reports it from the latter re- 

 gion,f and I have a specimen collected on Mt. Lowe by Mr. 

 Kinney. Mr. Abrams also reports having obtained it in the San 

 x\ntonio, San Bernardino and Santa Ana ranges. I have been 

 unable to detect it in the San Bernardino Mountains, and speci- 

 mens from that station with which Mr. Abrams has obliged me, 

 while indecisive, appear rather to belong to 0. diniiosa, the com- 

 mon scrub oak of the region. 



Fruiting specimens should be readily recognized, and it is 

 to be hoped that our resident botanists will endeavor to collect 

 material whereby its range may be definitely established. 



QuERCUs Engelmanni — That a student of oaks should 

 consider this species to have been improperlv segregated from 

 0. ohlongi folia, Torr., is conceivable: but that one who admits 

 the validity of the former should find Southern California speci- 

 mens which he is able to refer to the latter, is matter for aston- 

 ishment, yet, in "The Oaks of the Continental Divide, :|: in which 

 work the validity of 0. Bngclmanni is admitted, three specimens 

 from San Diego County are referred to 0. ohiongifolia. 



It will be difficult to convince those, who have a field knowl- 

 edge of the Blue Oaks of our Coast Ranges, that they are of 

 more than one species. One of these three specimens is of my 

 own collecting, and if it does not represent 0. Engleinanni, that 

 species has no existence. 



San Bernardino, Cal. 



Diptera. from Southern Californiot. 



Some Diptera which I obtained last year have been kindly 

 identified by Mr. D. W. Coquillett, as follows : 



(i) San Pedro, Calif. : Nansigastcr uniuiaculata. Towns.: Hcli- 

 cobia Iielicis (Towns); Chlorops assiniilis. Macq. ; 

 Ciller pipiciis. Linn. 



(2) La Jolla, Calif.: E.vorisfa confijiis. Fallen: Sciiotainia trili- 

 neata, V. T. Wulp. 



T. D. A. COCKERELL. 



*Prof. W. R. Dudley in Los Angeles Saturday Post, June 7, 1902. 



tLeroy Abrams' Bull. S. Cal. Acad., i :8q. 



tDr. A. P. Rydberg Bull., N. Y. Bot. Card., i :224. 



