54 REVISION OF THE CICINDELZ OF THE UNITED STATES. 
an inhabitant of our territory, I do not hesitate to introduce this species into our fauna, 
believing that its range will be found to extend north of the Rio Grande. 
GROUP XVII. 
A group containing species of rather flat form, brown metallic colour and sericeous sur- 
face, but specially remarkable for having the posterior lunule of the elytra represented by 
a large submarginal spot, while the terminal part, or lunule proper, is entirely wanting. 
The eyes are moderate, the head glabrous, finely granulate, striate near the eyes: labrum 
one-toothed: maxillary palpi green-bronzed ; labial of both sexes pale with the last joint 
bronzed. Thorax quadrate, hardly rounded on the sides, deeply impressed, more flat in 
the female than in the male, alutaceous, not rugose or granulate. Llytra serrate at tip, 
broadly rounded, with sutural spine distinct, punctures not deep, subsutural fovez not 
very distinct; with three marginal spots, one discoidal and one humeral round spot: be- 
neath metallic blue, pubescent at the sides; abdomen of one species partly red. ‘Two spe- 
cies of this group are known to me, both Mexican, of which one extends its range into Texas. 
48. ©. decostigma, obscura, fusco-eenea, fronte utrinque striolata, thorace quadrato alutaceo, vix rugoso, 
lateribus haud rotundatis parce albo-pilosis, elytris punctatis ad apicem serratis, spina suturali parva, macula hu- 
merali, tribus submarginalibus, alteraque discoidali inter secundam et postremam versus suturam, omnibus rotun- 
datis albis: subtus cyanea, versus latera albo-pilosa, pleuris cupreis, labro albo unidentato; palpis labialibus sexus 
utriusque pallidis articulo ultimo eneo. Long. -5. 
Chevr. Col. Mex. Ist cent. fase. 3. 
Fredericksburg, Texas, and Tampico, Mexico, Lieut. Haldeman, Rio Bravo: Dr. Ber- 
landiére. Very closely resembles C. flavopunctata Chevr.; but differs by its more 
dull colour, by the suture not being brilliant cupreous, and the last two joints of the ab- 
domen being bluish black instead of testaceous. 
GROUP XVIII. 
Moderately elongate species with sericeous surface and red abdomen. The labrum is 
one-toothed ; the labial palpi of both sexes are pale at the base, the maxillary are dark 
piceous at base. The head is glabrous striate each side. Thorax subquadrate, or sub- 
cylindrical, slightly hairy toward the sides. Elytra conjointly rounded at the apex in 
both sexes, and very obsoletely serrulate, moderately but not deeply punctured, with the 
normal markings divided into spots; the medial band short, sometimes not interrupted, 
usually (except in form 3,) in advance of its ordinary position; on the margin behind 
the medial band, and on the disc just before the apical lunule are additional spots. The 
legs are moderately long, and the dilated tarsi of the male moderate. The under surface 
is moderately hairy at the sides of the trunk and abdomen, very sparsely hairy about the 
thorax. There are three principal forms of which the second is found on rocky hills 
while the first is maritime. The habits of the third are unknown to me. 
