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By Frank Downs Parker

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Californicus Parker 6. ~ . .. .. 7 Hind tibia marked with yellow or red; c1ypeus api8 cally narrow (Fig. 115, 116) 7. Interocellar area with shiny median swelling. ยท , mixtecus Parker Interocellar area, if at all swollen, with surface dull, micropunctate tropicanus Parker 8. Summit of tergites I-II very shiny, mostly impunctate aridulus Parker Summit of tergites I-II dull, densely macropunctate 9 9. Interocellar swelling very large, lateral arms extending beyond lateral ocelli; California .

V-9-58 (R. M. , IV-20-55 (WRM) [CNC]; Victorville, V-9-55 (WRM) [CNC]. , IV-26-52 (J. G. , IV-19-60 (JFL). ARIZONA: Palm Canyon, V-29-55 (GDB); 5 mi. S. , V-3-55 (GDB, FGW); Roosevelt Lake, IV-17-47 (H&MT). -Chaenactis f1-emontiir, Encelia californica, E. frutescens, E. farinosa. - The extent of the bright red coloration varies in the females. In most of the material the red markings are present on the clypeus, mesopleura, propodeum, and abdominal segments I and II. The color pattern of the male abdomen varies; some specimens have a lateral white spot on tergite II.

The degree of swelling between the lateral ocelli varies, but there is no evidence of a geographical cline. In some specimens, especially from southern Mexico, the interocellar area is flat and densely micropunctate. This character appears sporadically throughout populations of acolh-ll~ts. -In examining the type of acolht~us I have found it to be the same as tylocephailis and have synonymized the latter. The males of acolhuus can best be distinguished by the short, flattened antennal hook (Fig.

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A Revision of the North American Species in the Genus Leptochilus (Hymenoptera: Eumenidae) by Frank Downs Parker


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