A new species of Neoeurygenius Abdullah (Coleoptera, Anthicidae, Pedilinae) from Arizona}?

By MOHAMMAD ABDULLAH Department of Zoology, University of Reading, England

The species from Arizona described below resembles Neoeurygenius porto- ricensis Abdullah from Puerto Rico more closely than to any other known species of Eurygeniini. The important differences lie in the abdomen and are sexual characters. Thus unlike portoricensis, the seventh adbominal ster- nites are emarginate in both sexes (figs. 3—4, 13); the parameres are irregu- larly polyspinous (figs. 10—11); and the median lobe has two prominent teeth on each cuticular blade (fig. 12). The definition of the genus Neoeury- genius (Abdullah, 1963) should be modified so as to include the above men- tioned characters. The hind coxae are neither contiguous nor as widely separated as in Anthicinae in both species.

The two species of Neoeurygenius Abdullah could be separated as follows.

Seventh abdominal sternites entire in both sexes; Puerto Rico portoricensis Abdullah Seventh abdominal sternites emarginate in both sexes; Arizona ...... grahami n.sp.

Neoeurygenius grahami, new species (Figs. 1—16)

Holotype. Male (author’s no. 514), U.S.A., Arizona, Maricopa County, August 23 (E. R. Leach), in the California Academy of Sciences, San Fran- cisco.

Colour. Fuscous.

Vestiture. Pubescence sparse, not completely concealing surface sculpture below; decumbent; white to yellowish white; irregularly, microscopically clustered on elytra, responsible for maculations.

Punctures coarse.

Sculpture reticulate on pronotum.

Head slightly longer than wide, nearly as wide as pronotum or only slightly narrower than pronotum at its widest part. Clypeus slightly ridged

1 Coleopterological contribution number 25. 2 The work was carried out while holding a Postgraduate Studentship of the Univer- sity of Reading. Entomol. Ts. Arg. 85. H. 3-4, 1964 [199]

200 MOHAMMAD ABDULLAH

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Figures 1—15. Neoeurygenius grahami n. sp.: 1, Mandible; 2, wing; 3, seventh abdominal

sternite of male; 4, seventh sternite of male; 5, seventh tergite of male; 6, eighth sternite

of male; 7, eighth sternite of male; 8, eighth tergite of male; 9, eighth tergite of male; 10,

tegmen of male, ventral view; 11, tegmen of male, ventral view; 12, median lobe of male,

ventral view; 13, seventh sternite of female; 14, seventh tergite of female, 15, apex of ovipositor, ventral view.

Entomol. Ts. Arg. 85. H. 3-4, 1964

A NEW SPECIES OF NEOEURYGENIUS ABDULLAH 201

Fig. 16. Neoeurygenius grahami n. sp., paratype ĝ.

at apex. Labrum narrow. Mandibles entire at apex, subapically with a few dentations; prostheca well-developed (fig. 1). Maxillary palp very weakly subcultriform (appearing filiform in low magnification). Labium with men- tum long. Antennae filiform; eleventh segment nearly twice as long as tenth segment. Head: width across eyes 0.85 mm; dorsal interocular distance 0.35 mm.

Pronotum medially distinctly sulcate. Wing-venation as in figure 2.

Seventh abdominal sternite emarginate at apex (fig. 3). Seventh tergite entire at apex (fig. 5). Eighth sternite emarginate at apex (fig. 6). Eighth ter- gite entire at apex (fig. 8). Parameres tapering at apex: dorsally and laterally polyspinous subapically, bases of dorsal rows of spines appearing as punc- tures in a ventral view (fig. 10). Median lobe with two prominent teeth on each cuticular blade, upper one sharp and lower one blunt at apex (fig. 12).

Total length 5 mm.

Allotype. Female (author’s no. 560), U.S.A., Arizona, Maricopa County, August 23, in the British Museum (Natural History) London. Seventh abdo- minal sternite emarginate at apex (fig. 13). Seventh tergite entire at apex (fig. 14). Apex of ovipositor as in figure 15. Total length 6 mm.

Paratypes. 10 designated. Records and Variation: U.S.A., Arizona, Mari- copa County, August 23, 1 male, in the B.M. (N.H.) London; 1 female (E. R. Leach), in the C.A.S., San Francisco; 1 male (F. W. Nunenmacher), in the Chicago Natural History Museum: 1 male, in the Deutsches Entomologisches Institut, Berlin; 1 male, in the Hungarian Natural History Museum, Buda- pest; 1 male, at Lund University, Sweden; 1 male, in the Philadelphia Aca-

Entomol. Ts. Arg. 85. H. 3-4, 1962

202 MOHAMMED ABDULLAH

demy of Natural Sciences; 1 male, in the Muséum National d'Histoire Natu- relle, Paris; 1 male, at the University of California, Davis.

Unidentified locality: “Orville, Tex. Co.”, 1 male, April 23, at Humboldt University, Berlin.

Intraspecific variation occurs in the following characters. In males, shape of seventh abdominal sternite as in figures 3 or 4; eighth sternite less (fig. 6) or considerably more (fig. 7) membranous or desclerotized in centre; shape of eighth tergite as in figures 8 or 9; and tegmen less (fig. 10) or more (fig. 11) tapering at apex. Length varies from 4.5—5.5 mm among males.

Seasonal distribution. April 23—August 23.

Remarks. I have much pleasure in naming this species in honour of Pro- fessor Alastair Graham of this Department in appreciation of his kindness towards me.

Reference

ABDULLAH, M., 1963, A new genus and a new species of pedilid beetle (Coleoptera, Anthi- cidae, Pedilinae) from Puerto Rico. Entomologist, 96: 181—185.

Entomol. Ts. Arg. 85. H. 3-4, 1964