OF WASHINGTON, VOLUME XVII, 1915 55 



DESCRIPTIONS OF BRACONIDJE 



BY S. A. ROHWER, Branch of Forest Insects, Bureau of Entomol<></i/ 



GENUS ALLODORUS Foerster. 



This genus, which has not heretofore been recorded in the 

 Nearctic fauna, may be separated from Triaspis Haliday by the 

 presence of at least a stump of the cross vein in the anal cell, by 

 having the fourth and fifth tergites narrowly visible, and by 

 the more or less convex venter. (In Triaspis the venter is con- 

 cave.) 



( 'haracters Common to the Nearctic Species. 



Black; legs ferruginous except the brownish posterior tibiic 

 and tarsi; wings hyaline, venation dark brown or black; front 

 shining, sparsely punctured; mesoscutum and meso-prescutum 

 shining, sparsely punctured; notauli'foveolate; the base of the 

 propodeum with two shining areas; posterior face irregularly 

 reticulate; the depressed area between the mesoscutum and 

 scutellum with a strong median carina; mesepisternum shining, 

 sparsely punctured; depression before the carina between the 

 mesepisternum and the mesepimeron foveolate; third antenna! 

 joint a little shorter than the second; ocelli in a little less than 

 an equilateral triangle; the postocellar line much shorter than 

 the ocellocular line; ovipositor about the length of the abdomen. 



Table to the Nearctic Species 



Face shining, very sparsely punctured; supraclypeal fovesc shallow; elyp- 

 ojil suture uniformly strong; the strisc of the third tergite straight. 



parallel and covering the entire surface fiskei (Rohwer) 



I ''are more closely punctured laterally and more or less rugulose medially; 

 supraclypeal foveic strong; clypeal suture poorly defined medially; striae 

 of the third tergite oblique laterally, and more or less concentric api- 

 (filly with a median area which is usually nearly transversely striatc 



-tomoxicB Rohwer 



Allodorus fiskei (Rohwer). 7Vm.s-y>/.s //.sAv, Kolnvrr, Proc. U. S. Nat. 

 Mus. Vol. 45, No. 1991, 1913, p. 535. 



Allodorus tompxiae new species. Length 4.5 mm. for both sexes. The 

 female agrees with the above mentioned characters. The males have 

 the head slightly paler than the females often having the face entirely 

 reddish yellow; otherwise they agree with the females. 



Falls Church, Virginia. Described from three females (one typo 

 and three males (one allotypc) recorded under Bureau of Entomology 

 number Hopk. U. S. No. 10122, which refers to note stating that this species 

 is parasitic on the larvae of Toni/i.rin lineella feeding in brashy wood of 

 Liriodendron stumps. Material collected and reared June 22, 1912, by 

 S. A. Rohwer. 



Type: Cat. No. 19096, U. S. N. M. 



