BRUES: PARASITIC HYMENOPTERA. 



23 



Chalcis praevalens Cockerell. 



There are two specimens of this species in the present collection 

 M. C. Z., No. 2087, 2088 (Nos. 5279, 7939, S. H. Scudder Coll.). 



Chalcis tortilis, sp. nov. (Fig. 14.) 



Length 4.5-7 mm. Head and thorax very coarsely and deeply separately 

 punctate, the sculpture on the collar less deep, and confluent to form a 

 transverse series of rather regular striatums. The parapsides especially to- 

 ward the sides show the same' transverse striation. Punctures on the scutel- 

 lum larger and better separated than 

 elsewhere. Mesonotum quite regularly 

 reticulate. Abdomen smooth, ovate; 

 narrow, only about two-thirds as wide 

 as the thorax. Head as usual in the ge- 

 nus, probably black; sides of the front 

 obliquely striate. Antennae black; 

 rather slender, the scape about half as 

 long as the flagellum; basal flagellar 

 joints about twice as long as thick. 

 Parapsidal furrows very distinct, twice 

 as far apart in front as behind. Scutel- 

 lum about as wide as long, regularly 

 rounded behind. Hind femora about 

 twice as long as broad, beset below 

 with rather small teeth, of a size and 

 number very similar to those of the 



recent C. ovata Say. Hind tibiae stout, their curve conforming with that of 

 the femur. Wings hyaline or nearly so. Marginal vein one-half the length 

 of the submarginal. Stigmal long, its shaft at least twice as long as the 

 width of the marginal vein at its insertion, knobbed at the apex. Post- 

 marginal about one-half the length of the marginal. 



Described from four specimens. 



Type.— No. 2089, M. C. Z., Florissant, Col. (No. 1350, S. H. 

 Scudder Coll.). Paratypes Nos. 2090-2092. Nos. 1065, 3538, and 

 5295, S. H. Scudder collection. In addition to these there is another 

 (No. 2093, M. C. Z., No. 5672 S. H. Scudder Coll.) which is probably 

 a ventral view of this species and also a side view (No. 2094 M. C. Z., 

 No. 7679 S. H. Scudder Coll.) which seems without much doubt to 

 belong here. 



Fig. 14.— Chalcis 

 Type. 



tortilis, sp. 



