PROC. ENT. SOC. WASH., VOL. 71, NO. 1, MARCH, 1969 99 THREE SPECIES OF MEXICAN KROMBEINIA HAVING AN ELONGATED TEGULA WITH AN EXTENDED APICAL ANGLE' -( Hymenoptera: Tiphiidae) Harry W. Allen, Research fellow. Deportment of Entomologij, Academy of Natural Scietices; Philadelphia, Pennsylvania 19103 and Collahorator, Entonwhgy Research Division, Agricidtural Research Service, U. S. Department of Agriculture, Moorestown, New Jersey 08057 ABSTRACT — Kromheinia evansi, n. sp., from Mexico is described and illus-trated and notes are given for K. veracruzae Allen and Krombein and K. nayarita Allen and Krombein. The author has recently identified a long series of males of a new species of Kromheinia which runs in key by Allen and Krombein (Allen & Krombein, 1964) to couplet 11. Since there was some doubt as to the identity of this species, both Krombein and Allen compared it with the holotype of veracruzae Allen & Krombein and Allen com-pared it with paratypes of naijarita Allen & Krombein from San Bias, Nayarit, the type locality of nayarita. It is a new, undescribed species which I have named in honor of Dr. Howard E. Evans who has col-lected a fine series, one of many such series of tiphiine species he has collected from western North America. It is difficult to overestimate the value of long series in detennining the speciation within this group. Krombeinia evansi, n. sp. (Figs. 1, 2) Male. — Front, to level of lowest ocellus with coarse punctures of first-degree density, but not contiguous, interspersed with numerous secondaries. Dorsal pronotum with coarse, round punctures ranging in density from third-to first-degree; medially apical two-fifths impunctate. Lateral pronotum with anterior process very prominent, particularly the broad, massive tooth at humeral angle; disc crossed by a fairly distinct groove. Mesopleuron on outer disc with primary punctures separated in most directions by much more than their average diameter; with minute secondaries everywhere somewhat more numerous than primaries. Tegula conspicuously elongated with parallel sides and a prominent extension of inner apical angle; 2.0 times as long as middle width (3 measured were 2.0, 1.9, and 2.1 ). Forewing hyaline. Dorsal propodeum with areola ( fig. 1 ) usually tapered with nearly straight sides, length about equal to basal width and about one and one-half times apical width; area beside areola highly polished; transverse carina very high and prominent. Lateral propodeum with rugulae on upper part fine, widely .separated and generally parallel; lower part flat, polished. Posterior aspect of propodeimi ^ This is the twelfth paper by the author ( tlie first as co-author with K. V. Krombein ) prepared luider National Science Foundation Grants GB-1240 and GB-,517I. -Immediate publication secured by full payment of page charges. — Editor.