233 



Chandler: Megaloptera 



Fig. 8:6. Aedeagus of Protochaul iodes species, a, montivagus; 

 ' b, simplus; c, minimus; d, aridus; e, infuscatus (Chandler, 

 original). 



Key to the California Species of Protochauliodes Weele 1909 



Adults 



Wings of male and hind wings of female black, fore 

 wings of female mottled, black areas predominating; 

 truncate end of aedeagus (fig. 8:6e) divided into thirds 

 by 2 ridges; wing spread 45-70 mm.; foothills of lower 



Sacramento Valley infuscatus Caudell 1933 



Wings mottled with dark and light, dark not predom- 

 inating 2 



Cerci short (fig. 8:7c/), twice as long as width of apex, 

 base and apex about equal in width, upper and lower 

 apical lobes equal; aedeagus blunt (fig. 8:6a), roundly 

 emarginate at middle, wing spread 66-88 mm.; Sierra 

 and Madera counties above 4,Q00 feet 



montivagus Chandler 1954 



Length of cerci much more than twice the width of apex 



3 



_ 



6 



Base of cercus with a large dorsomedial tuberocity 

 (fig. 8:7a), apex less than 1/2 the maximum width of 

 the base, apical lobes reduced; apex of aedeagus with 

 acute lateral corners (fig. 8:6a 1 ), emarginate middle 

 part a broad V-shape, wing spread 58-70 mm.; Butte to 



Mariposa counties aridus Maddux 1954 



Base of cerci without dorsomedial tuberocities, apex 



more than 1/2 the maximum width of base 4 



Cercus with lower lobe even with upper but narrower 

 (fig. 8:7e), definitely emarginate between lobes; aedea- 

 gus flat and simple (fig. 8:66), broad at middle, apex 

 1/2 as wide, acutely pointed at sides, roundlv emar- 

 ginate medially; wing spread 76-84 mm.; Los Angeles 



County simplus Chandler 1954 



Cercus with lower lobe longer (inverted footlike) to 

 short (fig. 8:7c) and equal to upper lobe, emargination 

 between lobes nearly even with upper lobe; aedeagus 

 more or less bent upward (fig. 8:6c), with prominent 

 lateral earlike processes, medial part bluntly produced 



5 



Wing spread 42-50 mm.; color dark smoky with macula- 

 tions rather indistinct; central California 



minimus Davis 1903 



Wing spread 65-86 mm.; membrane transparent and 

 maculations distinct; Alameda County to British 

 Columbia spenceri Munroe 1953 



Key to the California Species of Dy smicohermes Munroe 1953 



Adults 



1. Spots on the wings relatively small, seldom completely 

 crossing a cell except at base of wing, hump at base 



Fig. 8:7. Cerci in dorsolateral view, a, Protochaul iodes aridus; 

 b, Dysmicohermes crepusculus; c, P. minimus; d, P. monlivagus; 

 e, P. simplus; f, D. ingens (Chandler, original). 



of first anal vein prominent and black, media of hind 

 wing (fig. 8:4) 4-branched; male gentalia (fig. 8:7/) 

 with cerci slightly divergent, upper and lower lobes 

 much longer than wide; wing spread 120-160 mm.; 



Mariposa County ingens Chandler 1954 



— Spots larger, occasionally completely crossing the 

 cells in the distal half of the wing, hump at base of 

 first anal vein less noticeable, seldom entirely black, 

 media of hind wing 3-branched (rarely 4-branched); male 

 genitalia (fig. &:7b) with cerci short, upper and lower 

 lobes indicated by a horizontal groove around the end 

 of the cerci; wing spread 76-104 mm.; Shasta County to 

 Mariposa County crepusculus Chandler 1954 



REFERENCES 



CHANDLER, H. P. 



1954. Four new species of dobsonflies from California 

 (Megaloptera: Corydalidae). Pan-Pac. Ent., 30:105-111. 

 DAVIS, K. C. 



1903. Sialidae of North and South America. Bull. 68 N.Y. 

 St. Mus. Ent., 18:442-486- 

 MADDUX, D. E. 



1954. A new species of dobsonfly from California 

 (Megaloptera: Corydalidae). Pan-Pac. Ent., 30:70-71. 

 MUNROE, E. G. 



1953. Chauliodes disjunctus Walker: a correction, with 

 the descriptions of a new species and a new genus 

 (Megaloptera: Corydalidae). Canad. Ent., 85:190-192, 

 4 figs. 

 ROSS, H. H. 



1937. Nearctic alder flies of the genus Sialis (Megal- 

 optera: Sialidae). Bull. Illinois Nat. Hist. Surv., 

 21:57-78. 

 WEELE, H. W. 



1910. Megaloptera. In Coll. Zool. Selys Longchamps, 

 Brussels, fasc. 5, no. 115:1-95. 



