HEMIPTERA OP COLORADO 129 



market (Uillette). 



Ltcpidosaphes [Mytilaspis] citricola Pack. Det. through Howard. 



On lemons exposed for sale in the shops (Cockerell, 10). 



Fort Collins, May, common on "rusted" oranges in market 

 (Baker), and December 28tli nn ('alifornia oranges and 

 lemons ((lillette). 



Cbionaspis pinifolii Fitch. Uet. Cockerell. 



Fort Collins, October 6tli, abundant on spruce; Manitou, 

 September 29th on spruce ((lillette). 



Chionaspis ortholohis Comst. var. 



On willow at West Clill', as C. sali<?is L. (Cockerell, 10). 

 Chionaspis ortholohis Comst. var. Det. Cockerell. 



Denver, June 10th on cottonwood (John Tobias). 



In regard to the above record Cofikeroll (in litt.) says:— "The Wet Mountain Valley 

 salicis recorded by me, was not true salicis but ortholohis var." 



Regarding the species ortholohis and salicis Cockerpll (iu litt.) further says:— "If you 

 look at Comstock's descriptions you will find that he alludes to a difference in the 

 position of the median lobes of ortholohis and salicis. 

 Ortholohis has these lobes close together (sec figure), 

 whereas salicis has them divergent (see figure). Now we 

 have a specimen of orthololsis from California, from Mr. B. 

 W. Griffith, which shows the lobes close together as 

 Comstock describes. But your Denver species show them 

 wide apart, as in salicis. Yet your Denver scales are like 

 the Nebraska ortholohis (see my article in Can. Ent.) to all 

 outward appn.arance, and are not like salicis. But at this 

 point we prepared some English salicis, from Mr. Newstoad, 

 and they have the lobes close together as in ortholohis. 

 All this seems rather to confirm what I have suspected for some time, that tile so-called 

 salicis of this country 's not salicis at all, but a distinct species. If so, the synonymy of 

 the species discussed will probably stand thus: 



(1.) C. salicis (L). Europe. 



(•i.) C. ortholohis Comst. U. S. 



(3.) C. salicis-nigrac (Walsh.) U. S. or 'equals 'salicis Comst., not L. 



It is I)y no means clear, however, that your Denver scale is specifically distinct from 

 the Nebraska one, which we are calling otholobis (vide. Can. Ent.) and as it is certainly 

 not true European salicis, I should advise you to call it C. ortholohis var. for the present." 



Aulacaspis hoisdnvalii Sign. Det. Cockerell, 



Denver, November 24th on palm in greenhouse (Gillette). 



Palaeococcus simplex Scudder. 



Fossil at Florissant (Scudder, Tert. Ins. N. A.) . 



