328 

 Spogostylum an ale Say 



Anthrax anale Say, Jour. Acad. Nat. Sei. Phil., Vol. 3, 1823, p. 45. 



Larva. — Length, 12—14 i^^^- White. Head small and inconspicu- 

 ous (PI. LXXXIII. Fig. i), retracted within the first thoracic segment 

 to the point marked X in figure ; mandibles strong, slightly serrated on 

 latero-ventral surfaces, curved downward; dorsal surface of head 

 with 5 strong hairs arranged as in figure. Thoracic and abdominal 

 segments with strongly defined incisions between them; prothoracic 

 spiracle large; abdomen without noticeable spiracles (in preserved ex- 

 amples) ; apical abdominal segment conspicuously attenuated, pro- 

 duced in the form of a short point ; no surface hairs on abdomen or 

 thorax. 



Pupa. — Length, 12 mm. Testaceous. Head with the upper arma- 

 ture consisting of 4 strong thorns in a crescentic series, their bases con- 

 nected, and 2 smaller downwardly directed thorns near ventral sur- 

 face on median line as shown in Figure 9, Plate LXXXHI ; 6 long 

 hairs on head, 4 at bases of upper thorns and 2 at bases of the median 

 pair. Thorax with 4 long hairs, 2 above base of wing-sheath and 2 

 closely placed ones about midway between them and the dorso-median 

 line in transverse line with them; prothoracic spiracle distinct. First 

 abdominal segment with a transverse series of long closely placed 

 slightly curled hairs anterior to middle from a little distance on each 

 side of median line to a point more than midway to spiracle, the series 

 broadly interrupted in the middle, and this area without the short bris- 

 tles present in Anthrax and B.roprosopa; posterior to the spiracle on 

 first segment are about 6 remarkably long hairs directed outward and 

 slightly forward; segments 2 to 4 with the transverse armature con- 

 sisting of long hairs alternating with short bristles, the apices and 

 bases of the latter bent upward at right angles (Fig. 2) ; armature of 

 segments 5 to 8 consisting of long hairs, the series except on segment 

 8 usually with short, straight, alternating bristles; spiracles small but 

 distinct on segments i to 7; apical segment with 2 slender slightly 

 curved thorns (PI. LXXXHI, Figs. 8 and 10) ; armature of segments 

 posterior to spiracles consisting of very long hairs, that of ventral seg- 

 ments of transverse series of moderately long hairs which are discon- 

 tinued on middle of segments. 



The larvae and pupae from which the foregoing descriptions are 

 drawn, are those obtained by Dr. V. E. Shelford near Chicago, and 

 which were used by him as a basis for his paper on the species.* Dr. 



*The Life-history of a Bee-fly (Spogostylum anale Say) Parasite of the Larva 

 of a Tiger Beetle {Cicindela .scutellaris Say var. lecontei Hald.). Ann. Ent. Soc. 

 Amer., Vol. 6, No. 2, 1913, p. 213. 



