48 THE ENTOMOLOGIST. 



rather stout and short, with large claws ; tibia and tarsus with 

 numerous bristles ; digitules filiform, with minute knobs. Antennae 

 8-jointed. 



Measurements of legs and antennae in /x : — 



Anterior leg ; length of femur + trochanter 198, of tibia 90, of tarsus 51. 

 Hind leg; „ ,, „ 225, ,, 120, „ 51. 



Anterior leg ; width of femur 69, of tibia 42. 



Length of autenual joints: (1.) 39-48, (2.) 36, (8.) 28-30, (4.) 15-18, 

 (5.) 18-27, (6.) 21-24, (7.) 30-33, (8.) 57-60. 



Larva. — In ?, about 530 ^w. long, with legs and antennae well 

 developed; shape ordinary ; antenna 6-jointed, joints measuring in/x : 

 (1.) 24, (2.) 30, (3.) 18, (4.) 16, (5.) 16, (6.) 51. 



Hah. Cualata, Colima, July 28th (C. H. T. Townsend). 

 Quite numerous in the same galls as Akermes coUnice. P. ciuila- 

 tensis differs from P. pseudonipce in its legs and antennsG ; it also 

 differs from P. nipce (Maskell), especially by the short and stout 

 legs. The antennae seem invariably 8-jointed, and are rather 

 after the manner of P. neomexicanus (Tinsley). 



Note on the ant associated ivith Coccidce at Cualata. 



Some of the ants found at Cualata in the galls with Akermes 

 colimce and Pseudococcits ciialatensis were referred to Professor 

 W. M. Wheeler, of the University of Texas, who kindly reports 

 as follows : — 



*' The ant is Azteca longiceps. Emery. It agrees perfectly 

 with Emery's figure and brief description of a single dealated 

 queen from Alajuela, Costa Eica. These ants of the genus 

 Azteca live regularly in the modified stems of tropical trees in 

 what is usually regarded as a case of typical symbiosis. The 

 trees inhabited are mainly of the genus Cecrojna, and I suspect 

 that the cases observed by Prof. Townsend belong to this group 

 of plants. Emery, in his monograph of the genus Azteca, also 

 mentions the occurrence of A. depilis in vesicles on the leaves of 

 Tococa coi'onata, Benth. Fritz Mueller, Belt, and Emery all 

 record the occurrence of Coccids with species of Azteca, but they 

 do not appear to have described the species. You would un- 

 doubtedly find much material on this subject in Schimper's 

 ' Die Wechselbeziehungen zwischen Pfianzen und Ameisen im 

 tropischen Amerika'" (litt., Oct. 26th, 1902). 



It may be added that in Trinidad Palceococcus rosce and 

 Coccus nanus are found in the runs of Azteca chartifex, Forel. 

 Coccus nanus is the same as Lecanium nanum, Ckll., 1896. 



T. D. A. G. 



East Las Vegas, New Mexico, U.S.A. : 

 Oct. 30th, 1902. 



