246 CALIFORNIA ACADEMY OF SCIENCES. 



Lyg^eus bistriangularis Say. Specimens were col- 

 lected at the Calmalli mines, in April, by Mr. Charles D. 

 Haines. 



Lyg.'Eus reclivatus Say. Several specimens were 

 collected at Comondu, San Fernando and San Quentin, 

 in March and May, by Mr. Charles D. Haines. It is 

 also in the collection from San Jose del Cabo secured 

 by Dr. Gustav Eisen. 



Lyg^eus costalis H. Schf. Specimens have been 

 brought in from nearly every part of Lower California. 

 It was collected at San Jose del Cabo by Dr. Gustav 

 Eisen, and at Comondu, Calmalli mines and San Jorge, 

 in March and April, by Mr. Charles D. Haines. 



Lyg^us turcicus Fab. A few specimens of this 

 form were included in a large bottle of L. reclivatus Say, 

 which were collected near Cape St. Lucas by Mr. John 

 Xanthus. These two so-called species are but forms of 

 a true single species for which the name Lygcens turcicus 

 Fab. has priority. It is convenient, however, to label 

 them with the two names in our cabinets, since the west- 

 ern one is generally marked with the two white dots on 

 the membrane, while in the eastern form the two white 

 dots are usually absent. We now possess series from 

 both sides of the continent, taken from a single brood, 

 which not only include these two varieties, but others, to 

 which European entomologists have given other names. 

 That very wise closet naturalist, M. Montandon, insists 

 upon keeping the species separate, because one or two 

 specimens that I sent to him have the red color of the 

 head widely spread, instead of being confined to the mid- 

 dle of the vertex. The pattern of marking and spread 

 or depth of color in specimens of this insect are extremely 

 variable, and not one-half of the varieties of either col- 



