477 



Wirth and Stone: Diptero 



10. 



11. 



12. 



13. 



14. 



15. 



17. 



Posterior tibiae with one preapical dorsal bristle; not 



California Renocera Hendel 



Posterior tibiae with 2 preapical dorsal bristles 



Antichaeta Haliday 



Mesopleura and pteropleura with 1 or more bristles 



10 



Mesopleura and pteropleura at most with short hairs 



11 



One sternopleural bristle; 2 frontoorbitals 



Hoplodictya Cresson 



No sternopleural bristle; 1 frontoorbital. . Uictya Meigen 

 Arista almost bare; hind cross vein strongly bent, 



S-like 12 



Arista pubescent or plumose; hind cross vein sinuous 



or arcuate 13 



One pair of dorsocentral bristles; no bristles on callos- 

 ity beneath calypters; fore femur with weak bristles 



above; not California Hedroneura Hendel 



Two pairs of dorsocentrals; bristles present on callos- 

 ity beneath calypters; fore femur bristly above; not 



California Elgiva Meigen 



Two pairs of dorsocentral bristles; edges of 2nd anten- 

 nal segment nearly parallel; 1st vein ending almost 



opposite anterior cross vein 14 



Three pairs of dorsocentrals; 2nd antennal segment 

 obconical; 1st vein ending far before anterior cross 



vein; not California Poecilographa Melander 



Mesopleura, pteropleura, and callosity beneath calyp- 

 ters bare; only the sternopleura setulose > 15 



Mesopleura, pteropleura, sternopleura, and callosity 



beneath calypters setulose 17 



Lunule exposed; wings brown, with rounded clear spots 



16 



Lunule more or less covered; wings nearly uniformly 

 colored, the cross veins clouded, sometimes with short 



transverse marks, but no round clear spots 



Tetanocera Latreille 



Second antennal segment slender, much longer than 



the 3rd; not California Dictyomyia Cresson 



Second antennal segment quadrate and broad, scarcely 

 longer than the 3rd; not California . . Euthycera Latreille 

 Arista loosely black-plumose; interfrontal depression 



not polished; not California Trypetoptera Hendel 



Arista closely white-pubescent or short-plumose; inter- 

 frontal stripe shining Limnia Robineau-Desvoidy 



Known Larvae and Puparia 



1. Apex of caudal respiratory organ with well-developed 

 palmate hairs (fig. 14:616) 2 



- Apex of caudal respiratory organ without well-developed 

 palmate hairs; caudal end of puparium scarcely curved 

 upward; small species Poecilographa Melander 



2. Anterior respiratory organs of larva each with 5 or 6 

 openings; caudal spiracular disc with 3 pairs of small 

 lobes above and 2 larger pairs below; caudal end of 

 robust puparium sharply curved upward 



Sepedon Latreille 



- Anterior respiratory organs each with about 8 openings; 

 caudal spiracular disc otherwise; puparium more slender 



3 



3. Caudal spiracular disc with 8 triangular lobes; anal 

 plate about twice as wide as long; caudal end of 

 puparium short Tetanocera Latreille 



- Caudal spiracular disc with 8 broadly rounded lobes, 

 the ventral lobes larger; anal plate about as wide as 

 long; caudal end of puparium elongate. . . Dictya Meigen 



California Species of Sciomyzidae 

 Subfamily SCIOMYZINAE 



Genus Pherbellia Robineau-Desvoidy 

 (= Melina Robineau-Desvoidy) 



fuscipes (Macquart) 1835. 

 grisescens (Meigen) 1830. 



nana (Fallen) 1820. 



obtusa (Fallen) 1820. 

 pubera (Loew) 1862. 

 vitalis (Cresson) 1930. 



California 



Los Angeles, San Diego, 



and San Mateo 



Central and southern 



California 



California 



Alameda, Santa Clara 



Alameda, Marin 



Subfamily TE TANOCER INAE 



Genus Sepedon Latreille 



The larvae and puparia of the eastern species, S. 

 fuscipennis Loew, have been described and figured 

 by Needham (Needham and Betten, 1901) and Johann- 

 sen (1935), and the puparium of S. armipes Loew, 

 which also occurs in California, was described by 

 the latter author. Puparia of both species were taken 

 at pond margins under overhanging vegetation. Peter- 

 son (1951) has also figured the larva of Sepedon (fig. 

 14:61a, b). The adult classification of the American 

 species of this genus has been recently revised by 

 Steyskal (1950) from which the following key is 

 adapted. 



Key to Adults of the California Species of Sepedon 



1. Robust species about 8 mm. long; 2nd antennal segment 

 compressed, less than 3 times as long as wide (wide- 

 spread in California; syn.: pacifica Cresson) 



praemiosa Giglio-Tos 1893 



— Smaller species, usually less than 6 mm. long; 2nd 

 antennal segment slender, not compressed 2 



2. Hind femur of male with a constriction near middle of 

 ventral surface, basad of which tnere are 2 processes, 

 1 of which may be bifid; hind tibia distinctly more 

 curved in distal 3rd; abdomen brown with little more 

 than a trace of bluish reflection; oral margin usually 

 raised, rectangular in profile 3 



— Hind femur simple in both sexes; hind tibia evenly 

 arcuate; abdomen frequently almost black with bluish 

 reflections; oral margin usually low, the angle with 

 face acute; Shasta County borealis Steyskal 1930 



3. Frons with no more than a trace of parafrontal black 

 spots; basimedian femoral prong bifid; southern Cali- 

 fornia bifida Steys,kal 1950 



— Frons with distinct velvety black, parafrontal spots; 

 basimedian femoral prong not bifid; Modoc and Mono 

 counties armipes Loew 1859 



Genus Antichaeta Haliday 

 robiginosa Melander 1920. Mono County 



Genus Hoplodictya Cresson 



spinicornis (Loew) 1865. 



Los Angeles, 

 Santa Clara, Alpine 



