February, '13] COCKERELL: NEW COCCID.E 143 



ing claw) 480, measured along middle line; lateral margins of insect dcnselj- beset with 

 very short hair (about 50 long), but with occasional long slender hairs, 640 to 1120 

 long, these long hairs (dark in color) rather numerous at the caudal end. 



Habitat, Los Banos, Philippine Is., 1912 (C F. Baker). Five speci- 

 mens in alcohol sent by Professor Baker, who writes that in life it is 

 covered with thin short waxy hair-like material. It lives on the bark 

 of Ficus nota (I do not find oxij species of this name in the Index Kew- 

 ensis), " frequenting so far as I observe only areas covered with whit- 

 ish lichen patches, the color of which it imitates so closely as to be 

 very effectually hidden. It is commonly attended \)\ ants, which 

 lead to its discovery." Dr. W. M. Wheeler has kindly determined 

 this ant as Dolichoderus bituherculatus Mayr. 



By the 9-jointed antennae, this is related to Drosicha maskelli (Ckll.) 

 but in lichenoides the ninth joint is much longer and more slender in 

 proportion to the basal joints. D. corpulenta (Kuwana) is also re- 

 lated, but larger, longer in proportion to its width, and has verj^ dif- 

 ferent antennae, the joints much shorter in proportion to their breadth 

 (in lichenoides the joints beyond the second are considerably longer 

 than broad, the seventh about twice as long as broad). The longer 

 antennal joints also separate our species at once from D. contrahens 

 Walker and D. stebbingi (Green); the latter has 8-jointed antennae. 



A New Coccid on Grass 



Recently I had a few hours collecting at Glenwood Springs, Colorado, 

 in the company of Mr. E. Beth.el. On a species of Agropyron (proba- 

 bly A. biflorum) we found a mealy-bug in considerable abundance. 

 This insect, first observed by Mr. Bethel, proves to be an undescribed 

 Trionymus. 



Trionymus violascens n. sp. 9- Length nearly 2 mm., width about .75 mm.j 

 elongated, dark plum color, appearing grejash from a scanty secretion. Very short 

 caudal tufts of white wax, but no lateral ones. Antennse and legs hght ferruginous; 

 legs slender; claw with no inner tooth; claw digitules extremely fine, with very small 

 knobs. Caudal lobes hardly at all developed, each with a bristle about I'iOfJ- long. 

 Ovisac copious, pure white, forming fluffy masses on the grass stems. Labium short, 

 about 75,'J- long and 50 broad at base. 



The following measurements are in microns: middle leg, femur +trochanter, 175; 

 tibia, 125; tarsus (excluding claw) 75. 



Antennal segments: (1.) 38, (2.) 38, (3.) 25, (4.) 23, (5.) 26-29, (6.) 26-30, (7.) 33- 

 35, (8.) 70-75. The normal antennse are 8-jointed, but one specimen has a 7-jointed 

 antenna on one side, joint 6 of this antenna measuring 48/^-. Easily distinguished 

 from T. 7ianus Ckll. and T. californicus Ehrhorn, both of these being yellow or pale 

 yeUowish. T. americanus (Ckll.) is much larger, with a differently shaped labium. 

 In spite of the supposed generic difference, there is much resemblance between T. 

 violascens and the Cahfornian Ripersia festucae Kuwana. R. festucae has the 

 antennse 7 jointed, varying to 6; the labium is considerably broader than in T. 

 violascens. 



