two neiv Coccidtey/'ow N^ew Mexico. 405 



hair. End of tibia with a stiff bristle on inner side. Claw 

 rather short, curved. 



Anal ring with six very distinct hairs. Posterior tubercles 

 inconspicuous, each emitting a hair similar to that on the anal 

 ring. 



Sides of body with many round gland-spots, and margin 

 with pairs of short spines at intervals, at least on the posterior 

 part of the body. 



Lower lip elongated as in Orihezi'a, with about ten hairs. 

 Eostral filanicnls short. 



After boiling in caustic soda the insects appear pale reddish 

 brown or almost colourless ; they do not appreciably stain the 

 liquid. 



The above description refers to the adult female ; larvae 

 were found with them in June 1893, but the male is as yet 

 unknown. 



Hab. In the main street of Las Cruces, on leaves of 

 Fouquiera. 



When I first examined this insect I supposed it might be 

 identical with the Signoretia sp. recorded by Prof. Townsend 

 as found on Larrea ; but I now doubt whether this is the 

 case. It is certainly not a species of Signoretia^ Targ.-Tozz., 

 although as found living it has much superficial resemblance 

 to S. atriplicis as figured by Maskell. It does, however, 

 appear to be a Signoretia, Kraatz, which is the same as West- 

 uoodia^ Sign., and Bergrothia, Kraatz — the first two names 

 being preoccupied. Maskell would not sepai-ate Bergrothia 

 from Dactylopius, and certainly it is difficult to draw any satis- 

 factory line between these genera, owing to the number of aber- 

 rant iJactyloinus spp. described by him and others of late years. 

 The present species, though placed in Bergrothia, does not 

 agree in all respects with the accepted definition of that genus, 

 but it is much turther removed from tyi)ical Dactylopius. 



This is the first of its genus to be described from North 

 America ; but an unnamed species has been mentioned as 

 occurring on blue-grass in Indiana &c. (' Insect Life,' ii. 

 p. 327). 



The following is a list of the Coccidas at present known 

 from New Mexico : — 



1. N. g., n. sp., Riley, MS. G. Bergrothia Townseiicli, CkU. 



2. Dactylopius sp. (:' ?> t^pp.). 7. Orthezia Annte, ('/•//. 



a. Coccus, sp. n., 6X7/., MS. 8. I'rosopupbora rufescens, t'Idl. 



4. Lecaniodiaspis yuccse, lUley, 0. Ct-ropiastt's irregularis, Vkll. 



MS. 10. artemi.-i£E, Jiilei/, MS. 



o. Pseudococcus helianthi, f'A7/. 11. Lecanium robiniaruni, />o//v/. 



Ann. & Mag. X. Hist. Ser. G. Vol. xii. ."iO 



