6 U.S. NATIONAL MUSEUM BULLETIN 248 POSTHOsioua 



they are obviously ventral, with traces of sternites, separated from them, 

 in the posterior segments. 



Male genitalia: Of similar type throughout the group, but with more 

 or less important differences in detail (see figure). The basal plate is 

 comparatively short, and thickened, with anterior end slightly expanded; 

 the parameres as long as, or slightly longer than, the endomeral sac, 

 almost unpigmented, slender, and with tips curving outward ; basal portion 

 of basal plate with more or less thickened margins; endomeral sac more or 

 less elongated oval, sometimes with lateral margin thickened, and with 

 slender, internal, supporting struts. 



The movable sclerite is usually more or less elongated pear shaped, 

 rarely elongated spear shaped, and with usually (but not always) narrow 

 marginal carinae along basal half, and with its enveloping sac (at least 

 partially) with spiculated surface. 



Measurements are given in the tabulation below. 



M. p. pici M. p. pici M. p. dryobates M. p. dryobates 



c? 9 cf^ 9 



Menacanthus pici dryobates (Eichler) 

 Figure i:2,a,b 



Picacanthus dryobates Eichler, 1953, Beitr. Vogelkunde, vol. 3, nos. 3-4, p. 181, figs. 

 23-24. Host: Dendrocopus major major (Linne) . 



I have seen two males and two females of this species, one pair from the 

 British Museum taken on the type host, the other from Dr. Brelih, col- 

 lected on D. major pinetorum. There are no appreciable differences between 

 the two pairs. The figures given were drawn from the pair collected on 

 the type host. 



The measurements of this species differ somewhat from those of M. pici 

 pici (Denny), some being greater, others less. The head in pici dryobates is 

 shorter and wider at both temples and frons, while both pro- and ptero- 

 thorax are larger. 



In the male genitalia the endomeral sac seems to be shorter and wider 

 (not a dependable character), but the movable sclerite is the same as in 



