250 MAINE AGRICULTURAL EXPERIMENT STATION. I9II. 



scheme, though a study of the larval characters may somewhat 

 modify this grouping. 



SERIES I : With the setiila of the zuings not arranged in distinct 

 parallel roivs; siibcosta usually elongate. 



1. With a simple, unbranched cubitus. Acnemia, Asana. 



2. With undulating Rs, detached Mi and with numerous setae among 



the setulse of the wing. Neuratelia, Odontopoda. 



3. No defective veins, Rs arises before middle of wing, subcosta 



ends in the costa ; weak tibial setae. Boletina group. 



■ a. Proboscis elongate. Gnoriste. 



b. Proboscis short. Leptomorphus, Allocotocera. 



Boletina, Phthinia, Sackenia, 



Coelosia. 



4. Strong tibial setse. 



a. Middle ocellus lower than laterals ; venation defective. 



Rondaniella. 



b. Middle ocellus higher than laterals, the latter close to e}^e 



margin. Leia. 



5. Subcosta does not end in the costa. 



a. Lateral ocelli remote from eyes. 



Syntemna, Megophthalmidia. 



b. Lateral ocelli nearly contiguous to eyes. Docosia. 

 SERIES II: Setul<E of the zvings arranged in parallel roivs:' subcosta 



usually short. 

 I. Posterior basal seta of hind coxae wanting, tibial setse small. 



a. Antennae and palpi normal. Anatella, Trichonta. 



b. Antennae short, usually less than 15 jointed, second palpal 



joint enlarged. Cordyla. 



2. Posterior basal seta of hind coxa present. Genera 21 to 26. 



3. Posterior basal seta of hind coxa absent, tibial setae stout. 



a. Cubitus branched. Genera 27 to 3f. 



b. Cubitus simple. Sceptonia, Zygomyia. 



In this as well as in the lower subfamilies the parts of the 

 hypopygium furnish the most distinctive and easily recognizable 

 specific characters. The homologies of these parts are as yet 

 too uncertain and the terminology too unsatisfactory and inade- 

 quate to attempt descriptions and I have therefore only given 

 figures illustrating specific characters. In comparing a speci- 

 men with a figure it usually will be necessary to examine a 

 KOH preparation of the hypopygium which must be moved 

 about under a supported cover glass until it occupies a position 

 similar to that represented in the illustration, otherwise an 

 erroneous impression is obtained. The ovipositor of the female 

 in some genera appears to possess good characters but in gen- 



