742 BOSTON JOURNAL 



rufous, terminal joints piceous : mandibles and palpi rufous : tho- 

 rax, segments subequal : anterior and posterior ones convex, sub- 

 ovate, intermediate one with two slightly elevated convexities : 

 abdomen ovate-subfusiform : tergum with a transverse, triangu- 

 lar black spot at the tip of the second segment, another on the 

 third, the remaining ones confluent. 



Length one-fourth of an inch. 



The abdomen does not contract abruptly to the petiole but sub- 

 sides gradually. Yan der Linden says that the species of this ge- 

 nus are the females of species of Tengyra. ["Anh. des Sc. Nat- 

 Jan. 1829; p. 48.] " [300] 



TIPHIA Fabr. Latr. 



T. TARDA. — Body polished, black, punctured : mandibles pi- 

 ceous in the middle : metathorax with three longitudinal lines, 

 and the minute lines on the margin of the posterior declivity 

 very regular and obvious : wings tinged with honey-yellow : ner- 

 vures brown ; stigma black : incisure of the first abdominal seg- 

 ment not very much conti-acted : second segment at its basal mar - 

 gin with the minute longitudinal lines very regular and distinct • 

 palpi dull piceous. 



Inhabits Indiana. 



Length about three-tenths of an inch. 



The smallest species I have seen, and may be distinguished 

 from its American congeners by its size. The male has the me- 

 tathoracic lineations more distinct. It is smaller than the/emo- 

 rata of Europe. 



MYZINE Latr. Klug. 



1. M. HAMATUS. — Black ; thorax spotted and abdominal seg- 

 ments margined with yellow : the latter not abruptly emarginate 

 each side. 



Inhabits Indiana. 



% Body black, polished, with small punctures : nasus, labrum, 

 tip of the basal joint of the antennae, two spots between the an- 

 tennae and base of the mandibles yellow : collar on the anterior 

 margins interrupted in the middle and on the posterior margin, 

 yellow : thorax with a spot in the middle emarginate before, yel- 

 low : metathorax, a transverse yellow spot near the scutel and an 



[Vol. I. 



