22 bulletin: museum of comparative zoology. 



long as high; its surface sculpture not well preserved. Hind coxae projecting 

 in a raised line above. Antennae poorly preserved, long, reaching nearly to 

 the base of the wings. Metathorax transversely rugose, as long as the meso- 

 notum and nearly two times as long as the prothorax which is contracted in 

 front. Abdomen long and tapering, inserted well up toward the top of the 

 metathorax on its posterior slope, but I think this is due to a slight twisting 

 of the body out of its lateral position. Basal segment as long, but not quite 

 as wide as the second and somewhat narrowed basally; third narrower, and 

 longer, tapering to the tip; the remainder of the abdomen strongly produced 

 into a stylus-like tip which is at least one and one-half times as long as the 

 three basal segments and probably longer as the apex is not preserved. Legs 

 slender; brown, except the posterior coxae. Wings hyaline, not well pre- 

 served, but apparently with a long marginal and minute stigmal vein. 



Described from one specimen. 



Type.— No. 2086, M. C. Z, Florissant, Col. (No. 5657, S. H. 

 Scudder Coll.). 



This is one of the most remarkable chalcids I have ever seen. Un- 

 fortunately the parts are poorly preserved although the specimen is 

 very sharp and distinct when view T ed without magnification. How f ever 

 I feel well assured of its position here on account of its close similarity 

 both in size and habitus to the recent genus Ormyrodes Brues of which 

 only a single recent species, occurring in South Africa, has so far been 

 discovered. In the fossil form the abdomen is even more attenuated. 

 Certain eurytomids like Macrorileya and its allies are very similar in 

 form, but I hardly think the present species can belong in that family. 



CHALCIDIDAE. 



Chalcites debilis Heer probably belongs here, otherwise no fossil 

 forms of this family are known, except from Florissant. Professor 

 Cockerell has already published a description of one species of Chalcis 

 to which I have two others to add and also one Spilochalcis. 



Key to the Florissant species of Chalcis. 



1. Wings hyaline 2. 



Wings with a broad brownish band, abdomen two and one-half 



or three times as long as wide . . C. praevalens Cockerell. 



2. Scapulae, pronotum, and sides of mesonotum distinctly trans- 



versely striate in sculpture C. tortilis, sp. now 



Entire thorax irregularly coarsely punctate, only the anterior half 

 of the sides of the mesonotum with traces of striate sculpture. 



C. perdita, sp. no v. 



