276 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



Birds. As Atrichia Loew is not the same thing as Atrichia Schrank, 

 and cannot, for this reason, date its claim earlier than 1866, Atrichia 

 Gould has the priority. I propose to call the genus Pseudatrichia. 



Family CYRTLD^. 



The species described here are : — One Opsebius from California, and a 

 second one from Vancouver Island ; a Pterodontia from Oregon ; two 

 new Eulonchi, which raises to four the number of species of this peculiarly 

 Oalifornian genus. Au Oncodes, which I also possess, has been already 

 described by Mr. Loew. 



The descriptions of a large new Ooncea from Texas and of an Oticodes 

 from New England are also added. 



Eulonchus. 



Established by Gerstaecker, in the Stett. Ent. Zeitschr., 1856, for E. 

 smaragdinus, this genus has been gradually increasing since, and 

 counts now four species. None of them, as far I know, have been found 

 outside of California. Within that State, they occur almost at sea-level, 

 on the sands of Lone Mountain, San Francisco, as well as at an altitude 

 of 8,000 feet in the Sierra Nevada. 

 Legs altogether yellow: 



Proboscis (in and 9 longer than the abdomen; body of the female 



bright metallic green .smaragdinus Gerst. 



Proboscis shorter than ( $ ) or as long as ( 9 ) the abdomen ; body 



metallic blue or purplish in both sexes sapphirinus n. sp. 



Legs, or at least femora, black : 



Tip of femora and the greater part of the tibiae whitish-yellow; 



tegulse uniformly white tristis Loew. 



Legs altogether black, only the knees paler; tegulse margined with 

 black 4 marginatus n. sp. 



1. Eulonchus smaragdinus Gerstaecker, Stett. Ent. Zeit., 1856, p. 

 360. — Not uncommon on the sands about Lone Mountain, San Francisco, 

 according to the statement of Mr. H. Edwards. Three green specimens 

 which I have are females. Two male specimens which I received from 

 Mr. Edwards are smaller (one of them only 9-10 mm long), the proboscis 

 shorter, although still exceeding the abdomen in length ; the coloring is 

 bluish on the thorax, purplish-blue on the abdomen. Are they the 

 males of this species % If they are, Br. Gerstaecker was mistaken in 

 describing his green individuals with a long proboscis as males. 



2. Eulonchus sapphirinus n. sp. — Antennae black, sometimes 

 brownish or reddish toward the tip ; epistoma black or bluish-black; 

 ocellar triangle dark blue or purple ; sheath of the proboscis black ; body 

 metallic blue or purple, sometimes with greenish reflections, clothed with 

 dense, erect, grayish-yellow pile on the thorax; abdomen with similar 

 but much less dense pile, and with an appressed yellowish-white pu- 



