72 GEO. H. HORN, M. D. 



finely punctate, finely pubescent; epipleurse pale. Body beneath piceous, with 

 greenish surface lustre, except the pro- meso- and middle of metasternum. 

 Legs testaceous, the outer edge of all the tibise and both sides of the middle and 

 front femora piceous. Length .20 — .38 inch.; 5 — 9.5 mm. 



Male. — Last ventral with a moderately deep, almost semicircular emargina- 

 tion ; claws slightly bifid at tip. 



Female. — Last ventral with a more or less deep, nearly circular emargimition, 

 nearly closed posteriorly by an acute process from each side; claws bifid, slightly 

 posteriorly to the apex, the divisions more divergent than in the male, the inner 

 shorter. 



Variation in this species is really greater than has been observed 

 in any other. The color varies from green, which is not nearly so 

 bright as in flavolhnhata, through blue and purple to nearly black. 

 In the latter forms there is always a trace of purple in the black, 

 and the spots of the head and thorax always show more or less me- 

 tallic lustre. In those forms of the latter color others will be ob- 

 served with a dull yellow vitta extending from the base nearly to 

 apex. 



Without a considerable series the nearly black forms would be 

 suspected of being varieties of tomerdosa with the vitta obliterated, 

 but the broad plaga of the occiput separate them. In any event 

 the females may be the most readily separated from any other species 

 by the sexual characters. 



The distribution of this species is remarkable. Occurs in Cali- 

 fornia from San Diego northward, also on the New Jersey coast, 

 probably near Long Branch. The latter are all of the darker form, 

 and are certainly very misleading in appearance. 



T. flaToIimbata Mann., Bull. Mosc. 1843, p. 308; Lee, Proc. Acad. 1865, 

 p. 220. — Oblong, somewhat oval. Autennie piceous, paler at base, especially on 

 the underside, fifth joint but little longer than the third. Head yellow, occiput 

 with a broad greenish plaga, which is moderately closely punctate. Tliorax 

 twice as wide as long, slightly narrower in front, sides arcuate, disc with a mod- 

 erately deep transverse impression on each side, surface with a few scattered 

 punctures; color yellow, with the three spots as usual; scutellum piceous, or 

 partly yellow; elytra comparatively roughly punctate, the entire disc blue or 

 green, the side margin and apex yellow ; pro- and raesosternum yellow, sides of 

 metasternum and abdomen piceous, with more or less metallic surface lustre. 

 Legs and tarsi pale. Length .20 — .32 inch. ; 5 — 8 mm. 



Male. — Last ventral segment broadly and moderately deeply emargiuate; 

 claws finely bifid at tip, the inner division slightly shorter. 



Female. — Last ventral broadly semicircular, the apex entire ; claws more deeply 

 bifid, the division more divergent, the inner shorter. 



Among the species with metallic ornamentation two only have 

 comparatively roughly punctate elytra, the present species and con- 



