Strumigenys dryas

The few collections of this species have been from litter samples in lowland forest.

Identification
Bolton (2000) - A member of the lyroessa complex in the Strumigenys lyroessa-group. Seven species of the lyroessa-complex have a pronotal humeral hair, see under Strumigenys arrogantia.

Of these dryas is by far the most densely hairy. The other six species all lack erect hairs on the cephalic dorsum anterior to the occipital margin and lack pronotal pilosity except for the humeral hair; on the mesonotum they have only 3 pairs of erect hairs at most, located on the dorsolateral margins.

Distribution based on Regional Taxon Lists
Indo-Australian Region: Indonesia, Sulawesi.

Nomenclature

 *  dryas. Strumigenys dryas Bolton, 2000: 869 (w.) INDONESIA (Sulawesi).

Worker
Holotype. TL 2.5, HL 0.72, HW 0.57, CI 79, ML 0.20, MI 28, SL 0.30, SI 53, PW 0.34, AL 0.68. Characters of lyroessa-complex. Hairs on leading edge of scape narrowly spatulate. Dorsolateral margin of head with numerous short simple hairs that freely project laterally; these hairs arise from close behind frontal lobes to corner of occipital margin. Hair in apicoscrobal position not differentiated from the others in its vicinity on the margin. Cephalic dorsum with short erect stubbly hairs present from level of highest point of vertex to occipital margin. Minute near-erect ground-pilosity present among the stubbly erect hairs and also present anteriorly from level of highest point of vertex to level of frontal lobe. Promesonotal dorsum and dorsolateral margins with numerous short erect simple hairs; similar hairs also present on waist segments. Pronotal humeral hair stiff and simple, only slightly longer than others that follow it on dorsolateral margin of promesonotum. First gastral tergite with abundant short simple erect stubbly hairs.

Paratypes. TL 2.4-2.5, HL 0.70-0.72, HW 0.55-0.57, CI 76-79, ML 0.20, MI 28-29, PW 0.32-0.34, AL 0.65-0.68 (3 measured).

Type Material
Holotype worker, Indonesia: Sulawesi Utara, Dumoga-Bone N. P., ii.1985, 2 m2 sample of litter, lowland forest, 200-400 m., BB3 (P. M. Hammond). Paratypes. 5 workers with same data as holotype; 2 workers with same data but BB10 (BMNH,, ).