NORTH AMERICAN COLEOPTERA. 93 



D. soror Lee, Proc. Acad. 1865, p. 212; 12-punctataX var. Maun., Bull. Mosc. 

 1843, p. 309. 



This species resembles Vl-punctata in so many ways that a full de- 

 scription is hardly necessary. The following are the distinctive 

 points: Antennae almost entirely piceous, the basal three joints 

 merely slightly paler. Thorax less transverse, entire body beneath 

 and legs black; the size is usually less than in l2-pn)ictata. The 

 sexual characters are the same. 



As a rule the piceous spots on the elytra are larger than in 12- 

 pandata, and have more of a tendency to become confluent and in 

 a transverse direction, although specimens are not rare in which the 

 humeral spot is prolonged to the next series of spots. The spot near 

 the scutellura is confluent with its fellow, the two forming a quadrate 

 spot. 



At this time the query may be proposed as to whether 12-notatu 

 Harold is not related to soror in the manner that tenella is to 12- 

 ■pvnetata. 



Occurs from Oregon southward through California to Arizona, 

 and probably Mexico. 



D. balteata Lee, Proc. Acad. 1865, p. 213; Jacoby, Biol. Cent.-Amer. vi, 

 pt. i, p. 530, pi. xxix, fig. 23 ; sallei Baly, Jouru. Linn. Soc. Zool. xix, p. 227. — 

 Form very like \2-punctata. Autenuse piceous, three basal joints paler, joints 

 2-3 small, the third slightly the longer, the two together about equal to the fourth. 

 Head rufescent, smooth, a deep vertical fovea. Thorax pale yellow, or slightly 

 greenish, broader than long, slightly narrower in front, sides slightly arcuate 

 anteriorly, feebly sinuate thence to base; disc moderately convex, smooth, with 

 a fovea each side variable in extent; scutellum piceous. Elytra broader behind 

 the middle, moderately closely but obsoletely punctate ; color very pale malachite 

 green with yellowish white spaces as follows: the lateral margin uarrowly 

 nearly to apex, an oval subhumeral spot, a larger oval spot near scutellum, two 

 slightly arcuat« bauds which do not attain the margin or suture, one before and 

 ime behind the middle, an ill-defined spot near apex; entire body beneath pale 

 yellow, except metasternum, tibise and tarsi, which are piceous; tibiae distinctly 

 oarinate. Length .20 — .24 inch. ; 5 — 6 mm. 



Male. — Last ventral truncate and broadly emarginate; tarsi not dilated. 



Female. — Last ventral uarrowly oval at tip. 



The above description has been drawn from specimens in perfect 

 condition. The color of the elytra is, however, so dilated that it 

 soon fades by too long preservation in spirit or from exposure to 

 light. The color then becomes a dull yellowish white, in which, 

 however, traces of the paler bands may usually be seen on close 

 examination. 



TRANS. AM. ENT. SOC. XX. JUNE, 1893. 



