20 BULLETIN 31, UNITED STATES NATIONAL MUSEUM. 



ParaguH nigritis GiuiniiTtbal, Bull. d. Moscou, xv, Q6fi, 



Paraguft albipes Giuinierthal, 1. c. 



Paragus dispar Sfhnmuiol, Arb. u. Veriliul. d. Schles. Ges., 1842, 163. 



Paragus coadunatus Roiiflani, Nuovi Ann. d. Sc. Nat. di Bologua, 1847, 182, 10. 



Paragus tibialis Schiuer, Fauna Austr., i, 257. 



Paragus aurieaudatus Bigot, Annalea Soc. Ent. Fr., 1884, 540. 



Habitat. — Europe, North America!. 



3 $ . Length, 3 to 5'""". Very variable in size and color in the nu- 

 merous varieties, between which there are frequent connecting forms. 

 Wholly black or black green (var. ohsctinis., feinoraftis, an<l tibialis), 

 or black with the tip of the abdomen reddish yellow (var. luvmorrhons 

 and ceneus), or black with reddish yellow triangular spot on the third 

 segment (var. triangulatus and sigillatns), or black with the last three 

 segments yellowish- red, the antepenultimate one, however, wholly or 

 partly black. Antennae as long as the head, or somewhat shorter, 

 at the base usually blackish brown, the third joint of the same color, 

 often lighter below, and sometimes on the under side yellowish brown. 

 Face on the sides yellow, in the middle broadly shining black, on the 

 lower part somewhat projecting, and a small but distinct tubercle above 

 the oral margin. Legs light yellow, black on the base of the femora; 

 sometimes the black comprises the whole of the hind femora, except the 

 tip ; sometimes also the hind tibiae have a black or brown ring, or their 

 tip is brown. Scutellum wholly black. Wings hyaline, slightly grayish 

 yellow tinged. — Translation from Schiuer, Fauna Austriaca. 



I have several specimens from New England and California, in which 

 I can detect no difference from specimens from Europe. 



Paragus dimidiatus. 



Paragus dimidiatus Loew, Centur., iv, 63. 



Habitat. — District of Columbia (Lw.) ! 



5,9. Length, 3 to 4.25™™. iShining black-green; scutellum without 

 yellow. Face yellow, moderately projecting, with a median stripe in 

 both sexes. Legs yellow and ochraceous ; basal half of femora black. 

 Three segments of abdomen in the male ochraceous red. Wings hyaline ; 

 stigma very dilutely subfuscous. Very similar to P. tibialis, var. ha;ni- 

 orrhous, but the vertical triangle is less broad, the face less projecting, 

 and the pile of the whole body somewhat shorter. Third antennal joint 

 sordid reddish below. Abdomen of the female wholly black-green, of 

 the male with the first two segments black-green, the following ones 

 ochraceous red. As the picture of the abdomen in P. tibialis is very 

 variable it is probable that the same variability may be found in this 

 species. — Translation from original. 



The structural difterences given for this species may justify its sepa- 

 ration from P. tibialis, but in the examination of a considerable material 

 which I have compared with specimens of this latter from Europe I 

 have not been able to satisfy myself of diflerences sufficient to justify 

 specific separation. 



