48 Mr. T. D. A. Cockercll on some Mexican Coccid^. 



through Mexico, five were new, equal to about 41 per cent. 

 In tlie present state of our knowledge of the CoccidfB this is 

 probably about the normal percentage of novelties obtainable 

 on the mainland. When I went to Jamaica in July 1891 

 very little was known of the West-Indian species, and of 

 seventy-five now listed thirty-three were undescribed at that 

 time, equal to 44 per cent. 



Descriptive Notes and List of Species. 



(1) Aspidiotus articulatiiSj Morgan. 

 Vera Cruz, abundant on stems of rose j Soledad, on a tree. 



(2) Aspidiotus Jicus, Ashraead. 

 Vera Cruz, on an orange and on stem of rose-bush. 



(3) Aspidiotus scutiformis^ sp. n. 



Soledad, on leaves of a tree somewhat resembling those 

 of an Avocado pear, with A. articulatus, Aleurodes sp., and 

 black ants. 



? . Scale very flat, circular or suboval, with the (covered) 

 exuvise placed a little to one side. Diameter of scale about 

 2\ millim. Colour dull brown-black, with the margin 

 whitish ; exuvias large, pale orange, more or less shiny, not 

 nipple-like. One scale shows ten parasite-holes, five on the 

 exuviaB and five on tlie scale ; another shows twelve holes, 

 six on the exuvi^ and six on the scale. Twelve seems a 

 large number of parasites to have emerged from a single 

 Asjjidiotus. 



? . Broad pyriform. General colour pale orange ; lobes 

 yellow. No grouped glands seen. There are three pairs of 

 lobes, the middle pair distinct and rounded, not close together, 

 being separated by a pair of spine-like plates ; second and 

 third pairs of lobes flattened and elongate, the second pair 

 crenate. A pair of spine-like plates between the first and 

 second and second and third pairs, and also beyond the third 

 pair. Beyond third pair of lobes the margin is wavy, due to 

 the presence of six broad rudimentary lobes, with more or less 

 rudimentary spine-like plates between them. The last of 

 these lobes is a little more produced than the others. Beyond 

 this the margin is straight, with single spines or hairs at 

 moderately long intervals. Between the lobes are very long 

 narrow saccular incisions. 



Larva broad, oval, yellowish. Legs (at least the hiud 



