CYPHUS. 237 
characters separating C. 16-pwnctatus from its northern representative, C. modestus. 
The anterior tibie, too, are distinctly unguiculate in the southern form, and almost 
unarmed in C. modestus. South-American specimens sometimes have larger spots or 
the subapical markings partly coufluent. 
2. Cyphus modestus. (Tab. X. figg. 12-15.) 
Cyphus modestus, Gyll. in Schinh. Gen. Cure. i. p. 625" 5 vi. 1, p. 148°. 
Cyphus viridans, Boh. op. cit. vi. 1, p. 149°. 
Cyphus 20-punctatus, Jekel, in litt.’. 
Cyphus (Cenchroma) sublineata, Sturm, in litt.’. 
3. First ventral segment hollowed down the middle, the fifth obsoletely canaliculate to near the tip. 
Q. Fifth ventral segment with an oblique impressed line on each side in front. 
Hab. Mexico1245 (Sallé, ex coll. Sturm ; Trugui), Cuernavaca, Huetamo, Almolonga, 
Misantla (Hége), El Camaron, Puebla, Tehuantepec (Sallé), Guerrero (Baron), Amula, 
Rio Papagaio (//. H. Smith), Rio Balsas, near Cuernavaca (Wickham), Oaxaca *. 
A common insect in Mexico and varying in colour of the vestiture—white, 
cinereous, brownish, or olivaceous—and in the development of the black markings 
on the prothorax and elytra. ‘The following forms may be noted :— 
a. Prothorax with three arcuately-arranged spots on each side and a transverse one on the disc, the elytra 
each with six spots (two below the shoulder, obliquely placed, one on the disc before the middle, 
transverse, and three forming an interrupted, angulate, subapical fascia), and a common scutellar one. 
[=20-punctatus, Jekel.] [Fig. 12, 9 .|—Iio Papaguaio, &e. 
g. The prothorax with the subapical spots wanting and the one on the disc sometimes divided into two, 
the scutellar spot distinct. [= modestus, Sturm coll., nee Gyll.].—Huetamo, Rio Balsas, &c. 
y. The prothorax with the subapical spots, and the one on the disc also, wanting, the others small; the 
elytra without scutellar spot, those on the dise cordate or divided into two, the subapical spots varying 
in size—sometimes small, sometimes partly coalescent. [=modestus, Gyll.| [Figg. 13, 184, b, ¢.| 
&. The spots on the prothorax as in y, those on the elytra surrounded by a line of cupreous scales, the scutellar 
spot wanting. [Fig. 14, 9 .|—Puebla, Amula, Tehuantepec. 
e. The spots small, or partly or entirely wanting, the elytra sometimes with the alternate interstices some- 
what raised and clothed with darker scales ; the femora faintly spotted or immaculate. [=viridans, Boh. | 
[Fig. 15, d.]—Puebla, Tehuantepec, Cuernavaca, &c. 
Mr. Wickham informs us that he has taken this species in abundance at Rio Balsas, 
freshly emerged, in the early part of August, upon various bushes on the face of the 
mountain just across the river from the village. Amongst the eighty-two specimens 
examined by me, two only belong to var. a, eighteen to var. B, and three to var. 0, the 
true C. modestus (= var. y) being represented by a long series, and the var. viridans 
(= var. «) by numerous examples, including three from the Sturm collection. The 
male (of both C. modestus and C. viridans) has the penis-sheath broad and truncated at 
the apex (figg. 13a, 0). The length varies from 12-20 mm. The types of Gylleuhal 
and Boheman were examined some years ago by Dr. Sharp. 
