178 THE ENTOMOLOGIST. 



Agapostemon texanus, Cresson. — $ . Bluer than usual. Cerro 

 Chilicote, April 3rd, on flowers of some species of Compositse 

 (Townsend). Although this species is now first recorded from 

 Mexico, its occurrence in the State of Chihuahua could have 

 been predicted with certainty, as it is very common in the 

 adjacent parts of the United States. 



CocciD^. 



Tachardia cornuta, Ckll. — Cerro Chilicote, at mouth of canon 

 on south side, March 22nd, on a bushy composite plant called 

 Salvilla by the Mexicans (Townsend). The specimens are more 

 irregular than the original types. This makes the sixth lac- 

 insect from Mexico. 



Lecaniodiaspis rufescens (Ckll.). — Cerro del Chile, east base in 

 Arroyos, on green spiny shrub, March 26th, 1902 (Townsend). 



Eidecanium rohinice (Townsend). — Cerro Chilicote, April 10th, 

 on ash (?) and Rhus (?). Collected by Townsend. This is a 

 shiny dark ferruginous convex scale ; rugose, more or less pitted, 

 and covered with a waxy secretion at the sides. Length 6, 

 breadth 4, height 3^ to 4 mm. I have been doubtful whether to 

 regard it as veritable rohinics, and conclude for the present to 

 designate it as a new variety — subsimile — agreeing with rohinice 

 in the general form and appearance of the scale, the character 

 of the skin and the dimensions of the legs, but differing in having 

 the antennae 8-jointed (7-jointed in rohinia) and the eggs white 

 (pink in rohinicB). The antennae and legs of subsimile measure as 

 follows in /x : — 



Antennal joints: (1) 30-36, (2) 30-36, (3) 45-48, (4) 44-48, 



(5) 18-20, (6) 20-21, (7) 18, (8) 28-30. 

 Legs : femur and trochauter, 135-138 ; tibia, 96-102 ; tarsus, 



66-75. 



The scale is narrower and more shiny than specimens referred 

 to E. rohinicB, which I lately collected at Tempe, Arizona, on 

 osage-orange. The Tempe insect has the antennae 7-iointed, 

 measuring as follows :—(l) 33, (2) 30-36, (3) 42, (4)"^ 33-42, 

 (5) 18, (6) 15-16, (7) 30-38. 



It seems that E. rohinice and its varieties (or closely allied 

 species ?) are almost certainly natives of the south-west, and are 

 not identical with E. rohiniariim (Douglas), as has been supposed. 

 The exact classification of these forms is a matter of difficulty ; 

 we need more material from different plants and localities, and 

 a knowledge of the early stages and males. 



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

 April 17th, 1902. 



