SYNOPSIS OF NORTH AMERICAN SYRPHID^l. '20d 



CRIORHLNA/ 



Criorhitia Hoti'uianuseggc iu litt.; subgenus, Meigeu, S\ st. Bcschr.. ni, SM(lS2-2) ; 

 St. Fargeau and Serville. Encycl. Meth.,x, 518 (.lf^"-i^>); genus, Macquart, Hist. 

 Nat. Dipt.,i, 497 (18;{4). 

 Somula Macquart, Dipt. Exot. 'ie Suppl., 57, 1847. 

 Eriophora Phillipi, Verb. Zool. Bot. GeselL, xv, 7a6, L865. 

 Eurhinomallota Bigot, Annales Soc. Ent. France, 1882; Bull., No. »;. 

 Brarh;imiiia Williston, Can. Ent., xiv, 77, 1882. 

 Medium to large sized species, black or oretniisli black, with or 

 without light ground markings. Head much flattened, broader than the 

 thorax. Antennte situated upon a prominent conical frontal process, 

 third joint orbicular, or broader than long; arista bare. Face moder- 

 ately produced below the eyes, downward or forward, in profile with a 

 greater or less convexity in the middle. P^.yes bare. Scutellum dark, 

 not translucent. Abdomen elliptical or very short oval. Legs strong, 

 hind femora not. or but little, thickened [rerhosa), without projections 

 or bristles below, hind tibiie sometimes compressed and bent. Marginal 

 cell of wings open, third vein nearly straight, cross-vein beyond the 

 middle of discal cell, oblique. 



Sub-genus CRIORHINA. Face produced downwards, and forwards, 

 the proboscis more or less elongate. Eyes separated iu the male. Large, 

 thickly pilose species, the ground-color black, without light bands or 

 spots. 



Sub-genus Cl?^^ORHlNAt <new). Face produced downwards, con- 

 vex below, proboscis short. Eyes contiguous in the male. Moderately 

 pilose species, the ground-color with yellow markings. Type G. analis 

 Macq. (also Cr.faUax Linne, Europe). 



Sub genus SOMULA. Face produced downwards, convex below, 

 proboscis short. Eyes well separated in the male. Moderately pilose 

 species, in large part yellow. See page 216. 



The genus Criorhina is much confused. Meigen in 1822 (Syst. Beschr., 

 iii, 23G) divided the genus Milesia into two sub sections, A and B. Sec- 

 tion A was designated as "Fein haarige," and included the modern 

 Milesia, Spilomyia, and Temuostoma. Section B he gave as " Wollige. 

 (Criorhina Hgg )", including in the following order the species, 31. opi- 

 cata Meig. (= apiformis Schrank), herherina, oxacantha, flocosa, amlica, 

 rujicauda, and ranuncula. The lirst of these was figured as typical. 

 Macquart (Hist. Nat. Dipt., i, 497) in 1834 defined the genus, retaining 

 the species in the same order and adding several others, and also figur- 

 ing the first as the typical species. Meanwhile St. Fargeau and Serville 

 (Encycl. Meth., x, 518, 1825) had made apiformis Schrank, with which 

 apieata was afterward shown to be synonymous, the type of a new genus, 

 from the structure of the face {Pocoia). The genus can only thus date 

 from 1834, and be based upon Macquart's description rather than upon 



• Kpiof, a ram ; and 'Pic. nose. t Kvw, a dog ; and 'Ptg, nose. 



