Macrosiagon fernaldum Rivnay 1929

Macrosiagon fernaldum new species
The specimens in Mr. Frost's collection bear the label "flavipenne Lee." Those in Mr. Notman's collection are also confused with those of flavipenne. Dr. Horn, in his monograph on the
6 In the Leconte Collection the specimen at the extreme left, which is considered the type, has no locality label. This specimen is no doubt from New York, since the other males bear the label "Mo." genus, mentions a variety of fiavipenne from California in which the abdomen of the male is red. Dr. Horn referred, no doubt, to the male of this species. M. fernaldum is very closely allied to M. fiavipenne, and the male especially is very similar to the male of M. fiavipenne. The difference between them, however, is quite distinct, and the following are the most outstanding features by which the two may be separated.
The female of M . fernaldum has the processes of the antennae bifurcate, the elytra yellow with a brownish tinge at apex, the wings hyaline, while in 'fiavipenne the antennal processes are acute or truncate, elytra yellow with posterior half black and the wings are brown. The male of M. fernaldum has the abdomen red or brown red, wings hyaline, while M. fiavipenne has a black abdomen and wings smoky at least near costal margin.
Robust. Head dark brownish or black; lacinia yellow; antennae of male orange yellow, of female brown; pronotum brown or dark brown with margins often red. Elytra yellow with narrow strip near base brown; the tips of elytra in the female with brownish tinge. Wings yellow-hyaline; abdomen in both sexes red; in the males sometimes dark red or brown.
Head elongate, vertex elevated into a rounded carina, with the front surface concave and roughly punctured. Clypeus narrowly rounded, punctate with its margins often red. Labrum elongate, tapering anteriorly, pubescent. Lacinia of maxillae filiform; mandibles but little curved, smooth with pubescent areas on sides near base. Antennae of male with rami comparatively short, process of female antennae biforcate.
Pronotum tapering anteriorly; disc sparsely, sides more closely punctate, two slight depressions on disc near anterior margin. Posterior lobe acute, with a distinct elevated process, and two depressions on each side. Elytra dehiscent, acute at tip, finely punctured; a narrow strip near base brown, tips of female elytra with brownish tinge. Tibial spines truncate, smooth at tip. Second segment of hind tarsus equal to third and not flat and smooth above.
Length, 7 to 11 mm.
Type. — Male: Lindsay, California, Aug. 4, 191 1, (J. C. Faure). [U. S. National Museum, No. 41867.]
Allotype: — Female; Lindsay, California, July 29, 1909 (W. A. Davidson). [U. S. National Museum.]
Distribution. — The above description was made from four males and nine females from Lindsay, California, in the U. S. National Museum; from one female and two males collected in Palm Spring, California in the Frost Collection; from three females
bearing the label "Cal.", in Notman Collection, and from one male in the Horn Collection. The above specimens are labeled paratypes. Together with additional records the distribution is thus:
California: Lindsay, July (W. A. Davidson) (J. E. M. Gautt); Aug. (J. C. Faure), [U. S. N. M.]. Palm Spring, (Dr. Fenyes), [Mason Coll.; Frost Coll.]. Jewetta, Sept., (Rehn and Hebard), [Mason Coll.]. "Cal.", [Horn Coll.; Notman Coll.].
Specimens of this species have been taken on Asclepias. I call this species fernaldum in honor of Dr. H. T. Fernald, my first teacher in Entomology and much respected friend and guide.