446 HETEROMERA. 
one-fourth from the apex. In some of the Guanajuato specimens, several of which are 
before me, this spot is replaced by two longitudinal streaks (as shown in Dugés’s figures 
2 and 2G); in one from Villa Lerdo, obtained with the typical North-American form, 
the elytra are black, with the sides anteriorly and the apex yellow (as in Dugés’s 
figure 2J). In the male, joints 4—6 of the antenne are moderately thickened, the fifth 
ventral segment is broadly, feebly emarginate, and the sixth segment is very deeply, 
triangularly emarginate, the apex acutely produced on either side (as in Dugés’s 
figure 2g). An abundant insect in New Mexico and Arizona, according to Dr. Horn ?®. 
18. Cantharis scitula. (Tab. XX. figg. 25, ; 25a, sixth ventral segment, ¢ .) 
Moderately elongate, brassy-black, the elytra with the lateral margin and a broad median vitta extending from 
the base nearly to the apex yellow, the tibie and tarsi in part, and a spot on the hind femora, testaceous ; 
sparsely and rather coarsely pubescent, shining. Head sparsely, coarsely punctate; antenne rather 
short, the outer joints oblong-ovate; prothorax subcampanulate, almost parallel at the sides behind, fully 
as long as broad, transversely depressed before the middle, feebly emarginate in the centre at the base, 
sparsely, coarsely, irregularly punctate, a longitudinal space in the middle impunctate; elytra rather 
coarsely scabrous-punctate ; beneath sneous, thickly punctured, the outer spur of the hind tibis broad, 
the inner one slender. 
3. Antenne with joints 4 and 5 thickened; fifth ventral segment broadly and shallowly, the sixth segment 
deeply and subtriangularly, emarginate. 
Length 8 millim. (<¢.) 
Hab. Mexico, Chilpancingo in Guerrero 4600 feet (H. H. Smith). 
One example. Easily distinguishable from all the other species here recorded by the 
vittate elytra. 
19. Cantharis signaticollis. (Tab. XX. figg. 24,¢; 24a, sixth ventral seg- 
ment, ¢ .) 
Moderately elongate, black or pitchy-brown, the prothorax with an ill-defined patch on the middle of the disc 
in front and sometimes the sides also anteriorly, a small lateral spot excepted, reddish-yellow, the sides of 
the elytra anteriorly and a spot between the eyes sometimes of the same colour ; somewhat thickly and 
coarsely pubescent, shining, the elytra subopaque. Head coarsely and rather thickly punctured ; antennx 
moderately long in the male, shorter in the female, the outer joints oblong-ovate ; prothorax convex, 
almost as long as broad, emarginate in the centre at the base, transversely flattened anteriorly, rounded 
at the sides in front, almost parallel behind, sparsely, coarsely punctate, the disc with a smooth space on 
either side of the middle; elytra finely scabrous-punctate, and with two faint raised lines on the disc ; 
beneath thickly punctured and pubescent; outer spur of the hind tibie broad, obliquely truncate at the 
tip, the inner one acute. 
3. Antenne with joints 4 and 5 flattened and dilated, 6 a little stouter than 7: fifth ventral segment 
broadly arcuately emarginate, the sixth segment very deeply triangularly emarginate, with sharp lateral 
processes. 
Length 83-104 millim. (4 9.) 
Hab. Muxico, Matamoros Izucar (Sallé, Hoge). 
Four examples, two of each sex. This species closely resembles C. proteus, Haag 
(=sobrina, Dugés), which occurs at the same locality; but differs from it in the more 
distinctly emarginate base of the thorax, and in the dilated fourth and fifth antennal 
