222 PROCEEDINGS OF THE NATIONAL MUSEUM Vou. 113 
labial palpi one-jointed. True legs absent indicated by ambulatory tubercles. 
Thoracic and abdominal segments each with three dorsal plicae. Cerci absent. 
Anal segment wart-like. 
Pupa: Length about 2.25 mm. Light yellow, oval. Head and beak bearing 
several minute hairs. Prothorax dorsally bears a row of about twelve distantly 
placed chitinous hairs on anterior, lateral and part of posterior lateral edge; met- 
athorax with a similar pair arising from mid-dorsal portion; each abdominal 
segment with a transverse row of distantly placed chitinous hairs; abdomen 
terminated by a pair of outwardly directed chitinous spines. All hairs arising 
from tuberculate bases. 
The host-plant records which follow were taken from the material 
examined: 
In stems of Solidago at points of attachment of Cuscuta (adults reared) Chelsea, 
S.I., N.Y., Sept. 8, Spec. Surv. 20184 (USNM); ex stem Aster sp., on which Cus- 
cuta was growing (species reared) Berwyn, Md., Sept. 29, W. H. Anderson Colr. 
(USNM); ex stem of composite on which Cuscuta was growing (reared) Berwyn, 
Md., Nov. 8, W. H. Anderson Colr. (USNM). (The three preceding records are 
not included in table 1 on page 193.) 
Lar. in seed capsules of Cuscuta arvensis. Lar. into soil Sept. Ad. em. X, 1-8, 
’45, Beltsville, Md. (USNM); on Cuscuta, Snow Hill, Md., Aug. 3 (USNM); 
in Cuscuta arvensis seed, Metuchen, N.J., Oct. 12 (USN M); on dodder, Spalding, 
Ga., Oct. 20 (USNM); bred from Cuscuta arvensis Springville, Utah, Sept. 7 
(USNM) (the correct name for Cuscuta arvensis Beyr. is C. pentagona Engelm.) ; 
cotton, July 23 (USNM); On Ambrosia artemisiifolia Lexington, N.C., July 12 
(B. D. Valentine). 
Discussion: This species bears some resemblance to S. tychoides 
LeConte in general body form and proportions, color, and elytral scale 
pattern, but the twospeciesmay be distinguished by the differences indi- 
cated by the key on p. 217, and in the discussion of S. tychoides on page 
219. 
Although the western (California and Utah) and eastern popula- 
tions of S. seulpticollis are apparently widely separated geographically, 
the writer can find no morphological indication that all the populations 
do not belong to the same species. 
After comparing the types of Smicronyz sculpticollis Casey, S. gib- 
birostris Casey, and S. sagittatus Casey, the writer has concluded that 
all three specimens may be representatives of the same species. ‘The 
type of sagittatus has an impunctate median line on the prothorax as 
mentioned by Casey (1892), but otherwise the specimen is very similar 
to the type of S. sculpticollis. In the type specimen of S. gibbirosiris, 
the rostrum is slightly gibbous at the base, and the elytra are slightly 
shorter than in the average S. sculpticollis, but it is difficult to be cer- 
tain that these qualities are not the results of individual variation. 
DistripuTion: Records taken from the material examined in- 
dicate that S. sculpticollis is widely distributed on the Atlantic coastal 
plain, the Gulf coastal plain, the Appalachian highlands, and the 
central lowlands. This species has also been recorded from valley and 
