MACROBASIS. 399 
7. Macrobasis forticornis. 
Lytta forticornis, Haag, Berl. ent. Zeitschr. 1880, p. 411. 
Hab. Mexico (mus. Helsingfors). 
‘‘ Klongata, opaca, dilute brunnea, pube grisea vestita, sutura, margine lineaque angusta mediana albidis, 
humeris maculaque ad scutellum denudatis.—Long. 15, lat. 44 millim.— ¢ art. duabus primis anten- 
narum valde elongatis, 1° curvato, dilatato, capite longiore, 2° primo breviore.— ? latet.” 
We have not received an example of this species. It approaches WZ. distorta and 
M. purpurea in having a whitish-pubescent median line on each elytron, but differs 
from both in the form of the male antenna. 
8. Macrobasis diversicornis. (Tab. XVIII. figg. 19,3; 19a, antenna, ¢.) 
Lytta diversicornis, Haag, Berl. ent. Zeitschr. 1880, p. 427. 
? Lytta pallida (Chevr.), Haag, loc. cit.’. 
Lytia candézi, Haag, loc. cit. p. 43°. 
Macrobasis flavens, Dugés, An. Mus. Michoacano, ii. p. 58 (1889) *. 
Hab. Mexico”, Chihuahua city, Villa Lerdo in Durango, Acapulco+, Sayula in 
Jalisco, Jalapa (Hodge), Chilpancingo in Guerrero (H. H. Smith, Hoge), Ventanas in 
Durango (forrer), Buliacan (coll. Haag+), Tuxtla, Tehuantepec (Sal/é); GuaTEMALA 
(voll. Haag *, Sallé, Conradt), Guatemala city (Rodriguez), Chacoj (Champion); Costa 
Rica, Caché (Rogers). 
This is the commonest species of Macrobasis within our limits, and ranges as far 
south as Costa Rica. It was found in numbers by Herr Hoge at Chilpancingo. An 
elongate, narrow species, varying greatly in the colour of the pubescence—from 
cinereous to yellowish—and in the colour of the elytra—from piceous to testaceous. 
The tarsi are piceous or black, the femora and tibie usually in great part testaceous. 
The male has the basal joint of the antenne broadly flattened and slightly curved, 
unemarginate on the inner side before the apex, and as long as joints 2-6 united, its 
upper face sometimes grooved along the middle; the second joint flattened-cylindrical, 
narrower, nearly one-third the length of the first and a little longer than the next two 
joints together; joints 3-11 slender, 3 a little shorter than 4; joints 1 and 2 are 
subglabrous, and almost smooth, the following ones densely rugose and pubescent. 
The anterior tibiz in this sex have a single spur, and the basal joint of the anterior 
tarsi is flattened and sinuous, and almost smooth. The basal joint of the male 
antenna varies in width, it being considerably wider in some specimens than in others ; 
in these in which it is widest (particularly in two from Guatemala) the median groove 
is well defined. J. candezi is a dark form, and UM. pallida probably a light one, of 
M. diversicornis. M. linearis, Lec., from Texas, is an allied species; it differs from 
M. diversicornis in the relative length of the basal joints of the male antenna. 
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