FIVE NEW COCCID^ FROM MEXICO. 47 



side much longer than the posterior hxteral. Mouth-parts small. 

 Measurements in //. : — Diameter of larger dermal glands, 15 to 38 ; 

 anal plate, long. 210, lat. 126. 



Larva. — Quite ordinary ; oval; stigmatal spines in threes, one large 

 and two small ; marginal bristles few, simple ; last joint of antenna 

 36 fJL long. 



Hah. Zapotlan, on Leiiccena sp., July 7th (C H. T. Toivns- 

 end). It is preyed upon by some lepidopterous larva. N. leu- 

 ccence is closely allied to N. cliilopsicUs, but the scale is not so 

 dark, and the skin is different, the larger glands being larger, 

 and not occupying the same area as the minute ones. 



AkERMES C0LIM.E, U. Sp. 



? . Scale about 5 mm. long, ferruginous or coffee-colour, with a 

 partial covering of a sort of snuff-coloured tomentum, which also 

 covers the inside of the gall. They are shrunken, but appear to have 

 been nearly globular. Anal plates small and corrugated, surrounded 

 by a dark thickened area. The surface of the scale when seen with a 

 lens appears dullish ferruginous, minutely marbled and spotted with 

 black. No sign of any waxy or glassy secretion. 



Boiled in KHO, they scarcely colour the liquid ; but upon being 

 placed in very dilute KHO an abundance of a dark madder-red pigment 

 is given into solution ; in strong KHO this pigment becomes lilac, and 

 more or less of a blue flocculent precipitate appears. Nitric acid does 

 not restore the madder-red colour. The insect remains brown after 

 prolonged boiling. The skin is distinctly tessellated in places, the 

 tesserae being about 12 /x diameter. Marginal spines small and taper- 

 ing (about 18 /x long), not numerous, placed in an undulating row. 

 Some round gland-pits, about 27 /i. diameter. At least two transverse 

 bands of spines, these spines numerous and crowded, some as long as 

 42 /x ; connected with these bands are patches (about 175 ju diam.) of 

 very distinct round glands (about 6 /x diam.), placed at varying dis- 

 tances apart. Where the spine-bands reach the lateral margins (appa- 

 rently in the region of the stigmata), some of the spines are very long 

 and branched at the end. No legs or antennse found. Tracheal tubes 

 large, 30 to 90 /u. diameter. 



Hab. Cualata, Colima, July 28th ; in large hollow pyriform 

 twig-galls (about 18 mm. diam.) on a tree 12 to 20 ft. high 

 (C. H. T. Toivnsend). The galls are certainly not' made by 

 Coceids ; they are inhabited by ants, but may be lepidopterous 

 or coleopterous in origin. A. colimce is a remarkable species ; it 

 is to be regretted that the larva is unknown. 



PsEUDOCoccus [Dactylopius auctt.] cuALATENsis, n. sp. 

 5 . Length about 2 mm., entirely covered dorsally with dense 

 white secretion, very much as in P. pseudonipa (Ckll.) ; on boiling, 

 does not stain liquid ; after boiling, colour very pale pinkish, legs and 

 antennge light brown. Labium about 150 /a long and 84 broad. Skin 

 with the usual round glands, and rather numerous minute hairs ; 

 bristles of anal ring about 75 /x, caudal bristles about 120. Legs 



